What is BHA? I've been feeding Tubby and Peanut Science Diet for the last 15 1/2 years, so whatever it is it can't be all that bad. I guess ever since that very first vet recommended SD, I've never questioned it, and I can't say as I've ever read the ingredient list. I've just heard good things about it all these years so never had a reason to question it. I didn't answer the poll yet because I don't know what BHA is. Is it kind of like BGH - bovine growth hormone?