We got 2 cats who were brothers—littermates—from a friend of a friend, who owned the mother and took very good care of all the kittens until they adopted out most of them.

One of the two brothers is obsessed with food, and would cheerfully eat himself up to bowling ball proportions if we let him.

The other would, if permitted, be a very happy "graze when it suits him" cat. Alas, given his brother's propensities, this is not possible.

At least feeding him in a little ball with adjustable holes means he no longer regularly wolfs his food so fast he throws up...