Christa ~ I can't remember all the things you've tried, but have you tried human baby food? Meat flavored, of course. When Kuhio was getting very ill, it was the only thing she could keep down. I checked with the vet and he said it was fine. She ate a jar or 2 a day. Those suckers are $1 a jar up here. But, it was definitely worth it not to have to clean up puke all the time and it helped keep her weight up.