Hi - I would try Ozzie on some Canned pumpkin - Just 1 tablespoon per
day - adds some good fiber to his diet.
also give ozzie a new food - How about Innova EVO for cats or Wellness
for Cats... Better than the one you are currently using... mostly
meats and very little corns and fillers.

Also, a good supplement may help to take the EDGE off of this boy -
NuVET Plus is a great supplement to add to his food each day ... just
1 x per day /
here is the link
http://www.apluspetcare.com/untitled4.html

Need help ....just e-mail me.

BEST of luck - Marie Peppers LPN MA