We don't know what's wrong with our cat...first she wasn't eating and this fat cat went down to skin and bones...we took her to 3 different vets and the first one said it was her mouth, her teeth and gums were sore, and $400 and one week later that was supposedly fixed. But she was still not gaining weight, so we took her to vet#2, who said it was liver cancer, and so did #3 (our regular vet now), who gave us prescription food. We let her into my bedroom, which she is not usually allowed in, all the time, so she could eat without the other cats bothering her...and she started gaining weight, and feeling better, and getting herself into trouble by knocking plants over and trying to eat my gerbil >< so then she was allowed to go in my room only to eat. and that went okay for awhile, and we didn't get any more prescription food, and she went back to eating normal cat food. And now she's fat, and I think she's sick, because she's constipated (can't go poop) and doesn't like to be picked up. so now she's on a diet, and tries to eat anything!! I keep trying to get my mom to take her to the vet, but she doesn't go. :(