Lots to say about meats, so I will try not to rant too much - yes, Dianebabysmom is correct; and stay away for processed canned chicken products, too. I would say that transitioning cats off Royal Canin or other dry foods which are bloated with grains, which are bad for the cats in the long...
Garlic and onions can kill a cat - wouldn't give him garlic. It can lead to damaging the red blood cells if the amount is too much. Packaged Probiotics have mixed results. Once a cat's flora gets out of whack, it can be hard to get it balanced again. Primal dried beef and salmon nuggets...
(I realize this is an older post, but I hope this helps others who happen upon this post.)
TAPEWORMS!
Well, any significant infestation of parasitic worms can do this. But I have had multiple experiences, specifically because of tapeworms, in two of my cats. After giving them tapeworm...