First off, I just wanted to say that I am
no expert in the field of feline health (nor do I ever plan to be) but as a result of me choosing to switch my cats over to a (mostly) vegan diet, I was forced to learn- at the very least- some basic information on what makes cats "tick".
And so should you! This may require a few hours or more (probably more... yeah, definitely more) of browsing websites (preferably non-bias ones), talking to fellow vegan cat people, reading this blog, or getting yourself a copy of Jed Gillen's book, Obligate Carnivore. No excuses, people! Nobody cares how busy you are- your cat's certainly don't, and it's their health we are talking about here. So let's be realistic: you are attempting to feed an obligate carnivore vegetables; your loving, venerable kitties are dependent on your for their survival... so suck it up and hit the books, yo!
That being said, I don't want to come off as a know-it-all for vegan feline health. I most certainly don't know it all. So if you feel at any time that the information I give is incorrect or incomplete, or that you have heard differently, please share your comments!
FIRST: SOME DEFINITIONS
Magnesium: An essential mineral. It is involved in numerous functions of the body like energy production, formation of urea, in muscle relaxation, and neuromuscular transmission and activity.
Alkaline: A basic ionic salt of an alkali metal or alkaline earth metal element; the adjective alkaline is commonly used in English as a synonym for base, especially for soluble bases.
Methionine: An amino acid that acts as an acidifier.
Urine pH: Used to classify urine as either a dilute acid or base solution (alkaline). 7.0 is the point of neutrality on the pH scale. The lower the pH, the greater the acidity of a solution; t
he higher the pH, the greater the alkalinity. A cat’s pH should always read between 6.0 and 6.5.
As history has shown, the #1 concern you should have when first introducing vegan food into your cat's diet, is their potential increase of developing FLUTD.
FLUTD: Feline Lower Urinary Tract Disease
Because the water intake of a cat is quite low (keep in mind that naturally cats are desert-dwelling animals) the mineral content in their urine is usually fairly concentrated. Under certain circumstances these minerals can spontaneously arrange themselves into “crystals”. A cat’s urine pH is rated on a numerical scale. This value can change due to the amount of acid vs. alkaline in their urine. Cats benefit from a relatively low (acidic) pH of 6.0 – 6.5. The acid content in their urine is vital in fighting off the formation of crystals. A more alkaline (high) pH of 7.0 or higher can lead to the formation of struvite crystals (the most common type of crystals).
When a cat is fed a strictly plant-based diet, the risk of FLUTD is
increased simply due to the fact that plant protien is lower in acidity than animal protien causing their urine pH to rise. To help counteract this, most commercial vegan cat food is supplemented with methionine. These foods are also lower in magnesium which will yield fewer minerals in the cat's urine, therefor decreasing the potential for crystals to form in both numbers and in size.
Based on this information we can say that the development of struvite crystals is dependent upon the:
• Urine pH
• Urine volume
• Concentration of minerals in the urine (magnesium)
Once the formation of struvite crystals is present, a cat has the potential to become "blocked". This will happen when the crystals in the bladder increase to such a size that they become lodged in the cat's urethra, making it difficult for them to urinate. Potential signs that your cat may have developed some blockage are:
• repetitive trips to the litter box
• urinating outside of the litter box
• straining while attempting to urinate, usually accompanied by crying or meowing
• frequent licking of the genitals as well as vomiting or weight loss, due to stress
• presence of blood in the urine (this is serious, and means your cat is probably in extreme pain and requires an immediate trip to the vet).
If mild signs in your cat's behaviour lead you to believe they may have developed crystals, schedule an appointment with your vet asap to get it checked out.
A cat that has a partially or fully obstructed urethra requires immediate medical attention. It will be excruciatingly painful for the cat if left untreated and can be fatal in as little as 72 hours or less.
But wait! Before I completely scare you away from your vegan cat endeavours, it may be refreshing for you to know that the risk of FLUTD is substantially lower in females, as their urethras are both shorter and wider than a male's, so they are more easily able to pass any crystals that may have formed. Also, it is said that roughly only 10-15% of cats are prone to FLUTD (whether they are fed a plant-based or meat-based diet), while most cats will never experience it at all!
If you are concerned about your cat's pH level when switching them to a plant-based diet, or if they have a history of FLUTD, there are certain types of vegan food, such as VegeCat phi, that contain additional acidifiers to further help them maintain a proper (acidic) pH level.
Whether your cat does or doesn't have a history of FLUTD, there are certain preventative measures you can take at home. The most important one, as far as I'm concerned, is increasing your cat's water consumption. Increased water consumption will result in less concentration of minerals in the bladder. Also, more water = more peeing = less time for any potential crystals to develop. Increasing your cat's water intake can be done quite easily by:
• Getting your hands on one of those cat water fountains with the replaceable filters. (Cats are more likely to drink from something with moving water). I have two of these in separate rooms of my house and am constantly having to refill them. (Although, I must admit our two litter-trained rabbits are responsible for drinking a lot of it).
• Always making sure the water in your cat's bowl is fresh! Changing it several times a day may help.
• Putting ice cubes in their water bowl may entice them to "play" in it, dipping their paws in and licking off the water.
• I have even heard that cats will be more likely to drink when their water bowls are placed AWAY from their food dish.
• You may also want to try increasing the moist-food content in your cat's diet, as (obviously) moist food is considerably higher in water content than kibble. There are some brands of vegan cat food that offer moist canned products. Personally, I have had limited success with these as my cat's did not enjoy them very much, but many people have had great success. You can also try soaking your cat's kibble with a little bit of water and allowing it to sit until it has moistened. Yes, reminiscent to a bowl of soggy cardboard, it may be, but its worth a try! My cats have never gone crazy for it, but they tended to find it slightly more palatable if I coated the moistened pieces in a bit of nutritional yeast or crushed nori flakes. Certain baby foods like squash, sweet potato, applesauce or even crushed cantaloupe are appealing to many cats, so you may want to try adding a spoonful of any of those to the dry kibble.

Some cats, however, are sensitive to moist foods and may develop diarrhea or other stomach issues after consuming them. I must be honest, this is something that has always confused me, as the consumption of moist foods should most closely resemble the natural diet of a cat, which is comprised
entirely of "moist" food in the form of smaller prey animals. But then again, the moist food we feed our cats- even the finest, most expensive brands- have gone through a series of processing and supplementing, which in turn, far resembles their natural diet of wild prey animals. If you find your cat is sensitive to moist foods, but still want to include them in his/her diet, you may want to try using the
VegeCat supplement by Hoana. This supplement is incorporated into fresh homemade recipes using things like chickpeas, lentils, seitan, etc. with the addition of fresh fruits and veggies. Perhaps these recipes will be more gentle to your cat's stomach. Hmmm... something to think about.
Stress also plays a factor in creating potential risk of FLUTD. A happy cat is a healthy cat. Providing a comfortable and clean living space for your cat will help reduce their risk. A friend of mine had a male (non-vegan) cat who passed away last year from FLUTD. He was under the impression that his crystals were induced due to the environment of his home, as he was undergoing a lot of renovations at the time. His cat became unaffectionate, reserved and lethargic. He was unaware of the seriousness of these signs until it was too late. Although, I am not sure, it is possible that his cat had a small history of FLUTD, thus exacerbating the condition when the renovations began.
Use an appropriate number of litter boxes to accommodate the number of cats that are in your care, and keep them clean, as this will help your cats to remain stress-free. We have a total of four litter boxes throughout our house to accommodate our five cats and two rabbits, which we find is suitable. These get used a lot less during the warmer months when our cats spend a lot of time outdoors.
All beings benefit from affection and social interaction. Giving your cats the belly rubs, head-scratches and snuggles they deserve will make them feel loved and help to keep them stress- and FLUTD-free!
"Are there any other health concerns I should have about my cat's plant-based diet?"
No. Not really. But your homework isn't quite done yet, so keep your fanny parked and continue reading!
Having a basic understanding of the types of nutrients that are essential to your cat's health, and how plant-based foods differ from meat-based foods with respect to these nutrients will prove beneficial if/when your vet finds out you're feeding an obligate carnivore vegetables, and attempts to scold you for being "irresponsible". Knowledge is your armour, people!
As carnivores, cat's are dependent upon certain types of nutrients that can only be found naturally in animal flesh. They are as follows:
Taurine: An amino acid that is essential for the proper function of the heart, eyes (retinas) and reproductive system of cats, as well as the development and integrity of the nervous system. Humans and other omnivorous animals do not require a source of taurine in their diet, as our bodies are able to create it through bio-systhesis, from the presence of amino acids methionine and cysteine. Cats' bodies are unable to do this, therefore requiring a dietary source of taurine. In other words, taurine is to cats what vitamin B12 is to humans.
Vitamin A: Many people carry the presumption that vitamin A and beta-carotene are the same thing, when in fact they are not. Vitamin A is found only in animal products, while beta-carotene is found in an abundance of plant foods such as kale, carrots, sweet potato and apricots. We vegans obtain our vitamin A through our consumption of beta-carotene, which is then converted to vitamin A in our bodies. Cats bodies lack the enzyme responsible for making the conversion, creating a necessity for vitamin A in their diet.
Arachidonic Acid: An essential fatty acid that produces an inflammation response. Unlike other species, cats are not able to manufacture arachidonic acid from linoleic acid, therefore requiring a dietary source of it. Arachidonic acid is found primarily in animal products, but is abundant in certain types of seaweed, such as kelp, which is an ingredient found in vegan cat food.
Vegan cat food manufacturers use synthesized versions of taurine and vitamin A. Some anti vegan cat enthusiasts may argue that the synthesized versions of these nutrients are inferior to those found naturally in animal foods. I am no health scientist, so I can't argue against this. However, I do happen to know that many of the nutrients found in animal flesh (particularly taurine) are killed during the processing of non-vegan pet foods, and are therefor replaced by their synthetic counterparts once the bulk of the processing is complete. So regardless of whether somebody chooses plant-based or meat-based cat food, they are giving their loved one a hefty serving of synthetic nutrients in every meal.
There are other nutrients that are essential to feline health but that are not unique to animal foods alone. You can visit
http://www.peteducation.com/article.cfm?c=1+2243+2244&aid=2575 for more information.
Switching your cat to a plant-based diet may seem overwhelming at first. If you are overly concerned about potential health complications, such as FLUTD, then start out small. Make the switch to a 25% plant-based diet and slowly work your way up as your worries fade and your confidence grows. The least you can do it try.
In my next post I'll be discussing the ethical and moral issues that come with choosing to feed your cat a vegan diet. From a purely abolitionist perspective I'll confront the many bias- and ultimately, ignorant- accusations that I've encountered from omnivores and even fellow vegans over the years.
-Matthew Finateri