Cat is Getting Fat?

As many have suggested,, was your cat spayed/neutured? That always seems to make it easier for a cat to put on some extra pounds. Although, I did have a cat that stayed as slim as he was before being neutured. Have you tried putting the cat on one of the weight control foods? Has the vet seen him and does he seem concerned about the weight gain? The only other suggestion I can make is to play with him more,, the feathers on the string on the end of a 'fishing pole" are great for getting a cat more active.