My 2 cats were fine weight-wise until I started them on Nutrish by Rachael Ray. They loved it, but they both started losing weight. Tard ( my special needs cat) is so skinny I can feel every rib and bone in her body. Her sister Amy's weight loss isn't as extreme. They get a can of wet food daily. I give them the wet food so their stools aren't rock hard. They get iced spring water..fresh..at least 3x's a day. ( I get ice water..they get fresh ice water. yeah..they're spoiled a bit lol) I went back to a different dry food hoping it will help them gain some weight back. They do get "people food" sometimes as treats. I'll keep everyone posted to see if the change helps.