My sister has some chubby kitties and since I feed raw, I told her I'd ask about what she can feed, the vet of course recommended either Purina OM or Royal Canin Calorie Control. She is open to feeding just canned or a mixture of both canned/dry. Right now they are eating canned with about 1 Tablespoon of dry (kirkland signature) twice a day. She's got 1 kitty who is about 13.7# who should be about 10# and another who is 7# should be about 5# What is a good canned and/or dry food to help with weight loss? She's already restricted their food but in 2 weeks hasn't seen a loss in either one.