It is not recommended that you give garlic to cats in excess, simply because it is not good for them can cause a number of adverse reactions. A little bit of garlic is acceptable and traces of it are often found in certain types of cat food and treats but feeding your cat a lot of raw garlic is not advisable.
Feeding too much garlic to your cats can lead to a number of health problems such as upset stomach, vomiting, and diarrhea. By limiting the amount of garlic you give to your cats, you can reduce the chances of them having an adverse reaction to it.