Has anyone had their cat gain weight on a diet of canned food alone? I ask because my cat is overweight. He weighs approximately 16 pounds and should ideally weigh 12-13 pounds. He gained a lot of weight eating a combination of EVO and canned and he's now on Wellness Healthy Weight and canned. He gets 2.5-3 oz of canned a day. I mainly feed Wellness, Evangers, Innova, and Merricks. I don't feel that he's losing any weight since I switched foods several months ago. My next step is to try an all canned diet. Thoughts?