I found a very good article on the use of garlic for your pets, written by PetsbyPenny. I've been confused on this subject because I've read that garlic can be poisonous to pets, yet garlic is an ingredient in many pet foods and recommended by some as a flea deterent. Penny has given me permission to reprint her article here. I hope you find it helpful.
You read lots of advice about adding garlic to pet's food. It's supposed to do everything from discouraging fleas and ticks to stimulating a weak immune system. Holistic veterinarians, as well as alternatives practices such as Chinese medicine, recommend it. However, this is not a case of "if a little is good, more is better". Even this simple herb can be overdone and used incorrectly.
Recently, the fact that garlic is part of the lily family--as are shallots and onions--caused additional concerns among those who knew that a compound found in onions can cause anemia and possibly death in large enough and/or frequent enough doses. The dose is the key. It has to be quite large to harm a normal animal, or the animal must be eating it in food regularly. (That doesn't mean you should let Rocky have onions once a week when you have roast beef. Anything that is harmful should be avoided.)
But, what about an animal that is elderly or one with an immune system disorder or anemia? Most vets will say not to give it to your animal if any of these conditions are suspected. This is where it becomes important to consult a qualified practitioner. Allergies, for example, are the result of an overactive immune system. So is rheumatoid arthritis, lupus, and other immune system disorders.
Stimulating the immune system in humans or animals that have this type of disease can cause a flare-up and create additional problems. In aging animals, it can be difficult to recognize these diseases, just as it can be when they are in the early stages. So err to the side of caution, especially if you are administering herbs without the guidance of your veterinarian.
Many holistic veterinarians recommend adding garlic to homemade pet foods and as a supplement. There are a number of benefits to using this herb correctly. It can aid digestion, stimulate immune functions, eliminate internal and external parasites, and lower cholesterol. I tend to stick to the lowest recommended doses which is only about 1/8 teaspoon of garlic powder three to four times per week. Fresh garlic is less concentrated, but garlic cloves vary in size which means your dose varies too. So chop it up and measure it. I still wouldn't use over 1/8 teaspoon, as recommended above.
Personally, I don't ever give it to cats, but some holistic vets say it is safe in reduced doses. Cats have special problems with these types of herbs and tolerate very little. I wouldn't consider any more than half of the dog dose and give it only two or three days per week at most. If you try it and your cat rejects it, don't insist that your pet eat it. This advice applies to dogs too. Never force your pet to eat food or medicine that it rejects unless you consult your veterinarian and he or she instructs you to do so.
Brewer's yeast is often used in tandem with garlic, and it can also be very useful. However, I recommend adding one supplement at a time and using it for at least a week before adding another. One of my dogs is allergic to brewer's yeast, and it's in an amazing variety of foods and treats. You won't know what's causing a problem if you add multiple supplements or medications all at one time. The same applies to vaccinations.
It takes more time and costs a bit more to implement one thing at a time. Nevertheless, it's worth it because you won't have to try to guess which one caused a reaction if that ever happens. Any type of allergic reaction has the potential to become worse every time a person or animal is exposed to it. It is especially important to add or vaccinations one at a time as pets age. I can tell you from experience that even an animal that has never had a reaction may develop new sensitivities as their body changes.
Finally, take an occasional break from vitamins and supplements. Some experts recommend a week off every month. Others have various preferences. One vet I know recommends only giving our vitamin supplements on weekdays, which give more frequent breaks of shorter duration.
If you wish to read more on this subject, The Nature of Animal Healing, by Dr. Martin Goldstein, is one of the many good reference books available for pet guardians. Another good source of information is the Holistic Healthcare Library at the Only Natural Pet Store. If you have questions or want to find other sources of information, please don't hesitate to drop me an email or respond through the comment feature on this blog.
Now for the legal requirements: I'm not a veterinarian and nothing in this blog is meant to replace the advice of your veterinarian. It is also not to be construed as medical advice for people or animals. My purpose in sharing this information is to help you learn more about this subject. A knowledgeable pet guardian becomes a competent partner with their pet's health care providers.