Science

Here’s to Your Health

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As you may have noticed, these are rather trying times. Personally, I’m rather stressed. I have also lost all sense of time and have no idea what day I’m even posting this on. I am very much the type of person to stay in more than I go out, but quarantine measures have their effect on even the most introverted among us. Not to mention the anxiety of, well, everything, really. There’s a lot to worry about these days. However, if you have a cat–or several–there is good news! Scientists have demonstrated that cat ownership is beneficial to both mental and physical health. I could have told them that, and I bet you could have, too, but let’s go over the evidence just to make ourselves feel better, why don’t we?

This is what I’ve been doing for two weeks – Image by balzacan from Pixabay

The first thing I do every morning is spend a few minutes, sometimes longer, petting my cat in whatever fashion she demands. She certainly enjoys it, attention hog that she is, but it also helps me start my day feeling happy and relaxed. For me, merely watching a cat sleep can melt my stress away. It isn’t just me, as studies have found biological markers affected by contact with cats. A study with college students at the University of Northern Iowa determined that the students experienced a “small but significant decrease” in blood pressure immediately after being allowed to hold a cat or dog (1).

A study at Washington State University measured the levels of the stress hormone cortisol in the saliva of students before and after they a) interacted with provided cats or dogs, b) watched other people interact with the animals while standing in line and waiting, c) watched a slideshow with pictures of the pets the lucky experimental group interacted with, or d) sat in a waiting room for 10 minutes (2). The group that was actually able to pet and play with furry friends had significantly lower cortisol levels afterwards, an indicator of lower overall stress (2). Not everyone is a college student, of course, but it goes to show that the presence of a pet, even an unknown one, can demonstrably relieve stress. The next time someone calls you a crazy cat lady (or gent or neither or both), tell them the cats make you less crazy.

Gray and white cat with wooden heart
Cats are good for your heart <3 – Image by pasja1000 from Pixabay

A purring kitty sitting in your lap may be the pinnacle of relaxation, but did you know it may promote physical healing? Purring is one of the great mysteries of the feline family. Cats purr when they are content, but they are also known to purr when ill or injured. A study that aimed to uncover why recorded the purrs of forty-four felids from several species, including the domestic cat, and analyzed the frequencies of the sounds (3). All of the felids purred with strong frequencies in the 25-150 Hertz range (3).

In particular, the researchers noted that the pumas, ocelots, servals, and domestic cats produced “fundamental, dominant, or strong frequencies” at 25 and 50 Hz (3). Studies have found that frequencies between 20 and 50 Hz aid in the growth, healing, and strengthening of human bones (4). The same four species displayed a strong harmonic at 100 Hz, a frequency associated with treating pain, swelling, wounds, and labored breathing (3). Felines may have evolved purring, at least in part, as a mechanism for self-healing, but it now allows our house panthers to heal us as well.

Any cat lover would say that forging a bond with a cat can be healing, and they would probably say that loving a cat is good for the heart. The data would also say that it literally is. Having a cat has been associated with a decreased risk of dying from cardiovascular disease, including heart attack and stroke (5, 6). Even having simply owned a cat in the past conferred these benefits in one study (5). Ogechi et al only found this association with female cat owners. However, an Australian study demonstrated that all cat owners make fewer trips to the doctor and are less likely to be on medication for heart or sleeping problems than those without pets (7). Good news all around!

White and black cat laying beside baby
Preventing cat allergies one nap at a time – Photo by Manja Vitolic on Unsplash

But wait, there’s more! I was surprised by this, but it makes a lot of sense given my own experience. I was born with a cat allergy, but after deciding I wanted a cat anyway at a very young age (about five), I gradually stopped being allergic to cats. They are now almost the only thing I am not allergic to.

Allergies are a mystifying phenomenon. Exposure to something sometimes causes or worsens allergies and sometimes makes them go away. I found two studies that may shed a little light on how cat allergies work, however. Both suggest that exposure to cats early in life can prevent allergies later (8, 9). Like me! One study recruited children when they were 8-10 years old and checked in with them again twenty years later (8). They divided the subjects into groups based on whether they had a cat as a child (less than 18 years old), as an adult (more than 18), or both. Having a cat before adulthood had a protective effect against asthma and outdoor allergies by the time of testing (8). The other study focused on pet allergies specifically and determined that children with exposure to an indoor cat or dog within the first year of life were less likely to become sensitized to that same animal by the age of eighteen (9). New and soon-to-be parents, take note!

Don’t actually take parenting advice from me. I know nothing about children. Just cats. And in that regard, I soundly advise you to snuggle up with the nearest cat, as long as they are willing. After all, it’s good for your health. Stay safe out there, y’all.

Works Cited

  1. Somervill, J.W., et al. (2008). Physiological responses by college students to a dog and a cat: Implications for pet therapy. North American Journal of Psychology, 10(3), 519-528. https://psycnet.apa.org/record/2008-18014-007
  2. Washington State University. (2019, July 15). Stress reduction benefits from petting dogs, cats. ScienceDaily. https://www.sciencedaily.com/releases/2019/07/190715114302.htm
  3. von Muggenthaler, E. (2001). The felid purr: A healing mechanism? The Journal of the Acoustical Society of America, 110(5), 2666. DOI: 10.1121/1.4777098
  4. Klotter, J. (2002). Vibrational frequencies that heal. (Shorts). Townsend Letter for Doctors and Patients, 226, 28. link here
  5. Qureshi, A.I., et al (2009). Cat ownership and the risk of fatal cardiovascular diseases. Results from the second national health and nutrition Examination study mortality follow-up study. Journal of Vascular and Interventional Neurology, 2(1), 132–135. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3317329/
  6. Ogechi, I. (2016). Pet ownership and the risk of dying from cardiovascular disease among adults without major chronic medical conditions. High Blood Pressure and Cardiovascular Prevention, 23(3), 245–253. DOI: 10.1007/s40292-016-0156-1
  7. Headey, B. (1999). Health benefits and health cost savings due to pets: Preliminary estimates from an Australian national survey. Social Indicators Research, 47, 233–243. https://doi.org/10.1023/A:1006892908532
  8. de Meer, G., et al. (2004). Presence and timing of cat ownership by age 18 and the effect on atopy and asthma at age 28. Journal of Allergy and Clinical Immunology, 113(3), 433-438. DOI: 10.1016/j.jaci.2003.10.008
  9. Wegienka, G., et al. (2011). Lifetime dog and cat exposure and dog‐ and cat‐specific sensitization at age 18 years. Clinical & Experimental Allergy, 41(7), 979–986. DOI: 10.1111/j.1365-2222.2011.03747.x

Published March 28, 2020

Updated February 10, 2021

Breed Profiles

Savannah: Exotic Beauty

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I am going to be upfront–this article is as much a PSA as it is a breed profile. I do not support the breeding of hybrid cats, including the Savannah, and I will explain the reasons in the latter portion of the article. That being said, I do think everyone should have access to good information, whether it supports my opinion or not, and I have done my best to gather everything I could on these cats. I readily admit that it was a difficult process, as hybrid cats are very controversial, and there is a lot of contradictory information out there. If you know anything I have written to be demonstrably incorrect, please let me know.

Two servals
Pair of servals – Image by skeeze from Pixabay

Savannahs are a very new breed of cat, first created on April 7th, 1986 when a female kitten named Savannah was born to a successful mating of a female Siamese and a male serval. Servals are a species of African wild cat, significantly larger than a domestic cat but small as wild cats go. They’re pelts are typically golden yellow to beige with dark black spots, and Savannahs inherited a similar patterning as well as the exotic morphology of their wild parentage.

Since the first breeder of Savannah cats became established in the 1980s, they gained popularity quickly. The International Cat Association began registering Savannahs in 2001 and gave the breed championship status in 2012. The Cat Fanciers Association does not recognize any hybrid cat breeds (except the Bengal, which was grandfathered in), so Savannahs cannot be shown at CFA events. That has not slowed the breed down, however. For many people, the appeal lies in having a domestic pet that looks like a wild animal. And they certainly do look wild and beautiful.

Savannahs are about half the size of servals but are large for domestic cats. A Savannah that has a serval parent, known as an F1 (filial generation one), can reach 30 pounds (13.6 kg), but they get smaller with successive generations (F2, F3, etc.). After F1 the parents are all Savannahs or sometimes other domestic cats. The males are usually larger, but in the later generations, about F4+, the average size evens out to 12-18 pounds (5.4-8.2 kg). They look larger, however, because Savannahs are so tall and long. An F2 is 14-17 inches (35.6-43.2 cm) tall, with the height decreasing somewhat until F4. Savannahs are the tallest breed of cat. A Savannah holds the last two Guinness word records for tallest cat, at 19 inches (48.3 cm) and just over 19 inches. Non-hybrid cats are usually around 9 inches (22.9 cm) tall.

A breed standard Savannah has a pattern of spots similar to a serval, with rows of dark spots along their body and smaller spots on the head and extremities. They are permitted to come in four colors, but alternative colors and patterns are sometimes sold by breeders. The most common coat color is brown spotted tabby, which is most similar to the coloration of a serval. The base color of the coat is golden brown with black spots. The second most popular is silver spotted tabby, with a gray/silver base and black spots. Black and black smoke Savannahs may appear solid black from a distance, but they actually have darker black spots on a somewhat lighter base coat. Black smoke Savannahs have a white undercoat, giving them a bit of a smokey appearance.

Cheetah portrait shot
“Tear-stain” markings are common in spotted wildcats – Photo by jean wimmerlin on Unsplash

Savannahs have large, almost bat-like ears, perched high on the head, like their serval parents. They also inherited light-colored ocelli marks on the back of these huge ears (see serval picture above). Ocelli marks, also called eye-spots, are found in many species, including some butterflies and fish as well as wild cats, and they are believed to be an adaptation to deceive predators. They may draw attention away from the real eyes or make the animal seem larger and more threatening. Tabby cats sometimes have these anyway, but they are characteristic of Savannahs. The large ears combine with a wedge-shaped head and long muzzle to really emphasize the jungle-cat look of Savannahs. Dark tear-stain markings around the eyes are reminiscent of wild cats as well.

The personality of Savannah cats is influenced by their filial generation. F1, F2, and F3 cats tend to exhibit more wild behaviors while F4 and later act more like typical domestic cats. In general, Savannah enthusiasts and breeders describe the breed’s personality as similar to that of a working dog. They are high-energy, very intelligent, and very affectionate. They are known for enjoying playing fetch and a propensity for learning tricks.

Savannahs tend to bond strongly with their people and want to be with them and involved in what they are doing at all times. Many Savannahs like water, so that can include bath time! Due to their activity level and intelligence, Savannahs can become bored easily and get into mischief if not provided with enough attention and stimulation. They love jumping and climbing, so they need enough space and appropriate surfaces for them to explore. These cats can jump up to eight feet (2.4 m) high, so keep that in mind when cat-proofing for them.

Savannah cat playing fetch

Whether or not Savannahs are generally healthy cats seems to be a matter of much debate. Some sources mentioned only a slightly higher risk of hypertrophic cardiomyopathy, a disease where thickening of the heart muscle can lead to heart failure. It was almost universally acknowledged that male Savannahs prior to F4 are usually sterile due to genetic incompatibility between domestic cats and servals, a phenomenon known as hybrid sterility. However, rescue organizations mentioned other health problems that they have come across, the most common being irritable bowel disease/chronic diarrhea. There are suggestions that raw diets or diets without corn may alleviate IBD in hybrid cats, but it’s unclear.

Savannah cats are a very expensive breed, with the cheapest going for around $1,000 (USD) but some fetching as much as $35,000. Lower-numbered filial generations, females, and rarer colors and patterns garner higher prices. Much of the hefty price tag is attributed to the difficulty of breeding savannahs. As mentioned earlier, servals and domestic cats are partially incompatible, leading to male hybrid sterility, among other problems. Even convincing the two parties to mate can be difficult. There are differences in behavior, and servals are much bigger and more aggressive. The servals often kill the domestic cats, perhaps seeing the smaller feline as food rather than a possible mate (1).

Even if physical and behavioral limitations do not get in the way, Savannah breedings are often unsuccessful. Many result in miscarriages or premature births (1). Servals have a gestation period of seventy-five days, but domestic cats have a gestation period of sixty-five days. Male servals are usually mated with female domestic cats to produce F1 Savannahs, so the kittens may be born small and/or underdeveloped (1).

You might think that someone who has spent that much money on a cat would never give it up, but Savannahs and other hybrid cats are frequently given up to animals shelters or wild cat rescues, or simply set loose. Animal shelters have started refusing to take hybrid cats due to liability concerns or because they doubt they can find homes for them. If they do take them, they may put them down immediately. Wild cat rescues are often the best hope for hybrid cats that owners want to surrender, but both Wild Cat Sanctuary and Big Cat Rescue say on their websites that they cannot accommodate the deluge of requests to take hybrid cats. Neither sanctuary takes surrendered hybrid pets, although WCS says they will consider F1 cats.

Savannah cat sitting
Savannah cat glamour shot – Image by skeeze from Pixabay

Why are so many Savannahs and other hybrid cats being abandoned? Some people have excellent experiences with their Savannahs. Unfortunately breeding a wild animal with a domesticated one does not always achieve the advertised wild look and domestic behavior. Genetics does not work that way, and so it is that Savannahs frequently exhibit wild cat behaviors as well as exotic looks.

One of the most common problems is spraying. This is a common problem with cats, but it is on another level with a cat that has wild genes. Wild cats have to mark miles of territory, and so Savannahs, even when neutered, male or female, may feel compelled to do the same, spraying all over the place, sometimes even on the people they consider theirs.

Savannahs can also be very destructive with tooth and claw, sometimes aggressively and sometimes in play. They tend to be biters, and with a cat that big that can be a serious issue. They also tend to scratch or chew up their environment as a wild cat would tend to do. Giving them plenty of exercise, walking them on a leash, or providing them with an outdoor enclosure (with a roof) to let off steam can help with destructive tendencies.

Aggressive tendencies may be more difficult to deal with. Savannahs can be very affectionate, but they usually bond to one or a few people, and even then they are sometimes unpredictable. Some Savannahs are very aggressive. Although they are marketed as getting along well with children and other pets, sometimes they do and sometimes they really, really don’t. They’re strong prey drive can be particularly troublesome if there are small pets in the house. That high intelligence may be directed toward learning how to open the hamster’s cage.

Savannahs of earlier filial generations tend to display more of these undesirable wild behaviors. For this reason, some breeders only sell cats of later generations, but that leaves the earlier ones in the lurch. We shouldn’t blame the cats for acting in ways we don’t appreciate. It is in their DNA, after all. Cats domesticated themselves thousands of years ago. A couple generations of breeding the domestic form to a wild animal cannot make a new domestic creature. Wild Cat Sanctuary suggests that anyone who has bought or adopted a savannah or other hybrid cat and regrets it try building an outdoor enclosure with a heated den (https://www.wildcatsanctuary.org/education/species/hybrid-domestic/what-is-a-hybrid-domestic/). They keep their small wild cats and hybrids in the same set-up. This puts a Savannah in an environment where it can be as wild as it wants and cause no trouble.

If you would like a Savannah, whatever your reasons, I strongly recommend adopting one. As a rule, we should all adopt, not shop, but especially in this case. Buying these cats encourages breeding more, but adopting them gives homes to the many who have been abandoned without supporting the problematic Savannah breeding industry. Two organizations I came across during my research were Savannah Cat Rescue (http://svrescue.com/) and Specialty Purebred Cat Rescue (https://www.purebredcatrescue.org/). There are probably others, and you could always try contacting your local animal shelter and letting them know of your interest. Make sure to look up your local regulations on exotic pets first, because some places have bans or restrictions on savannahs.

Works Cited

  1. Seder, R.A. (2017). AAFP position statement: Hybrid cats. Journal of Feline Medicine and Surgery, 19(3), 312-313.

Published March 21st, 2020

Updated March 12th, 2021

Cat Care

Feline Leukemia Virus (FelV)

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In memory of Simba

Feline leukemia virus (FelV) is a fatal virus afflicting cats. One of the most common infectious diseases among cats, FelV is present in approximately 2% of cats in the United States and 3% in Canada (1). It is the leading cause of cancer in cats and can cause a host of other health problems as well. As such, it is imperative that cat people of all stripes be aware of this dangerous disease and how to prevent and cope with it.

Pale ginger tabby cat sitting on carpet
Simba, a FelV+ cat – Photo by Emma Sullivan

When a cat is infected with FelV, virus particles are shed in their saliva, urine, feces, and nasal secretions. Queens also shed the virus in their milk. Cats can become infected by fighting with and being bitten by an infected cat, engaging in grooming, or, more rarely, through sharing a litterbox or food/water dish. Kittens can be infected by their mothers both before and after birth. The virus cannot survive more than a few hours outside of its host, so cat-to-cat contact is usually required. Kittens are more vulnerable to infection than adult cats, as their immune systems are not fully developed. Cats with other illnesses are also at greater risk. However, even healthy adults can be infected, especially with repeated, prolonged exposure.

Veterinarian giving injection to a kitten
No kitten likes being poked with a needle, but FelV vaccines save lives – Image by skeeze from Pixabay

There is a FelV vaccine which has helped to reduce the prevalence of FelV over the past few decades. The American Association of Feline Practitioners recommends that all kittens receive the vaccine and the one-year booster, but considers it optional for indoor-only adult cats without other risk factors (2). The vaccine is recommended for at-risk adult cats, namely those with access to the outdoors, living with a known FelV+ cat, or living in a multi-cat household where the FelV status of all cats is not known (2). There are no major risks associated with the vaccine (2). Any cat may have an allergic reaction to any vaccine, so it’s best to keep on eye on them for a few hours afterwards.

The FelV vaccine has been refined over the years for increased effectiveness, but no vaccine is 100% effective, so the best strategy is to prevent exposure. Keeping cats indoors will make sure they avoid infected individuals outside. If you do allow your cat outside, supervising them or containing them can also do the trick. Walking them on a leash would count as both. Inside, it is important to separate FelV+ and uninfected cats. Ideally, FelV+ cats should be only cats or should live exclusively with other FelV+ cats so that there is no one to infect. Whenever bringing a new cat into the home, have your veterinarian test for FelV so that there are no surprises. If the new cat tests positive, it is recommended to separate them from your uninfected cats until you decide what to do next.

It can be difficult or impossible to tell by observing a cat whether they have FelV. FelV causes disease progressively and affects individuals differently, so a cat may show few or no symptoms early in their infection. However, there are some signs to keep an eye out for:

  • Poor coat condition
  • Pale gums, yellow color around mouth and whites of eyes (jaundice)
  • Diarrhea
  • Weight loss/poor appetite
  • Lethargy
  • Recurring infections
  • Seizures, behavior changes, or other neurological symptoms
Pale ginger tabby cat getting his belly rubbed
Simba enjoying some belly rubs – Photo by Emma Sullivan

FelV gradually causes a cats immune system to deteriorate over time, leading to secondary infections and sometimes blood cancers. Cats may become anemic. Research continues, but so far there is still no cure for FelV. A veterinarian will instead treat the effects of FelV, the other diseases and symptoms it causes. The disease, or rather the problems it causes, will eventually prove fatal, but an infected cat can lead a normal life in the meantime. The median lifespan of a cat after diagnosis with FelV is 2.5 years, which may not seem long to us, but it is quite a chunk of time to a cat, and any time that they are able to enjoy is worth it if we are able to give it to them.

Works Cited

  1. Levy, J.K., et al. (2006). Seroprevalence of feline leukemia virus and feline immunodeficiency virus infection among cats in North America and risk factors for seropositivity. Journal of the American Veterinary Medical Association, 228(3), 371–376. DOI: 10.2460/javma.228.3.371.
  2. Scherk, M.A., et al. (2013). Disease information fact sheet: Feline leukemia virus. Journal of Feline Medicine and Surgery, 15, supplementary file. PDF

Published March 12, 2020

Updated April 23, 2020

Behavior

The Difference Between Feral and Stray Cats

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Stray cat hiding in tunnel
Image by Yolanda Coervers from Pixabay

The words “feral” and “stray” are sometimes used interchangeably, but feral and stray cats are in fact very different. It’s important to know how and why if we wish to help both of these types of community cats.

First, we need to know what it means for a cat to be socialized. All cats in the species are considered domestic cats, but not all domestic cats are socialized. Socialization is the process by which a kitten becomes accustomed to human interaction–being pet, held, spoken to, etc. Socialization teaches a kitten that humans are providers and friends, not something to be afraid of. Kittens must be socialized early in life. The window in which a cat can be socialized varies somewhat from cat to cat, but by the time a cat is an adult, it is almost always too late.

Strays are community cats that are socialized to humans. They are former pets which have been lost or abandoned. Stray cats may be friendly to people or approach them seeking food or help. Or this may also not be the case, especially if they have had negative experiences with people or been on their own for a long time. Regardless, the distinguishing feature of strays is that they have been socialized at that crucial time of life and are therefore capable of living with humans again. Stray cats should be rescued and adopted because they are not well-equipped to survive on their own. They would be safest and happiest in a loving home, although they might require some time to adjust.

Feral cats are wild animals. They are not socialized and exhibit fear and aggression toward humans, which they view as a threat. Feral cats may learn to tolerate a human caregiver who feeds them, but they do not become friendly and trusting, and they are not happy indoors. They are very in-tune with their home territory and have grown up learning how to survive outside. An adult feral cat cannot be socialized, and animal shelters know this. If ferals are brought in, shelters typically euthanize them, knowing that they are not adoptable. Feral kittens as much as a few months old can be fostered and socialized, although they should be kept with their mother until they can be weaned whenever possible.

The most effective and humane way to help feral cats is to provide food, water, and shelter and to practice TNR: trap, neuter, return. TNR consists of trapping feral cats with humane traps, getting them sterilized (and sometimes vaccinated), and then returning them to their territory. This way, the cats can live longer, healthier lives as individuals, without producing more homeless kittens. When ferals cats are neutered, it is standard practice to clip the top quarter inch of the left ear. This is known as ear-tipping and lets others know that this cat has already been sterilized. It prevents cats from the trauma of being trapped and transported to a clinic unnecessarily.

Ear-tipped cat laying on bench
Ear-tipped cat – Photo by Michiru Maeda from FreeImages

Since the best way to help strays and ferals is different, knowing how to tell them apart is important. Unfortunately, that can be extremely difficult, especially when the cat is scared. An adult cat which approaches you, acts friendly, or allows you to touch them is almost certainly a stray. Strays are more likely to assume tail-up, welcoming postures and to meow or purr around humans. A feral cat will avoid or hide from you, won’t let you touch them, and will stay low to the ground or make themself small. A stray may make eye contact, but a feral will not.

Feral cats usually live in groups called colonies. They are bonded with the other cats in their colonies and are often seen with other members of the group. Strays usually live alone and don’t tend to hang out with other cats. Strays are more likely to be seen during the day than feral cats. Feral cats may keep to their natural crepuscular or a nocturnal one that avoids people as much as possible. And perhaps the most obvious difference is that feral cats keep themselves well groomed as part of their daily routine, but stray cats, especially new strays, are very stressed and have lost their routine. It’s much more common to see a stray with a dirty or disheveled coat.

We all want to do the best we can by our feline friends. In the case of feral cats, however, they live their best lives outside. It’s important to know that not all street cats are the same. Keep in mind that some wish they could snuggle up on the couch with us, while others would be thrilled if we would just throw a bowl of food on the lawn.

If you are worried about the cats in your community, many places have local organizations that rescue strays and/or TNR ferals. If there is not one in your area, there is a plethora of online resources to help you determine the best course of action for your situation. Alley Cat Allies (https://www.alleycat.org/) is a personal favorite. Your local animal shelter, even if they cannot take in feral cats, may be able to provide advice or humane traps.

Published March 5, 2020

Updated June 23, 2021