Yes, only wet food. Not every day. She will eat rabbit without a topper. I guess because it has tiny pieces of meatI think a lot depends on the cat: some cats seem more tolerant of bone than others. Two teaspoons a day doesn't seem like much but I'd keep an eye on the litter box and check with the company about the bone content as well as the phosphorus if I were going to use it longterm. I think you're using it on wet food, right? If so, I'd be less concerned about that.