Sorry I don't have any advice for you with the food issue. I use Comfortis for my 2 yorkies in the summer. They have both been fine taking it, and it works great. I saw my first flea last October, called the vet, went and picked up the Comfortis, gave it to them with dinner, and an hour later I had 4 dead fleas on the floor. Never seen any since. I'm sure the fleas could have been alot worse but I use Sentinel too. |