2 years ago, my wife saw a fat orange adult cat at an adoption fair and HAD to have her. We already had 2 cats, so I was hesitant, but once I found out that this cat had been there for nearly 3 years, I couldn't leave her there. So we adopted her. She has turned out to be the nicest, friendliest cat I've ever owned. But lately, in the last 6 months, she has been having recurring litterbox avoidance problems, and the vet and repair/cleanup bills have gotten too high. The last time she was at the vet, he was concerned that it may not be a simple UTI and could be kidney disease. We simply aren't able to keep paying the vet bills, and replacing carpet, only to have the same problem return a month later. I really don't want to do this but I'm at the end of my rope here. I'm trying to tell myself that returning her to the shelter is the best thing to do for her too, but I don't really believe it. I'm not confident anybody else will want her (she is 6 years old, obese, and has a badly misshapen eye from a head trauma), but the shelter says we must return her rather than give her to anyone else. so i don't know. Anybody have any suggestions for anything I can do?