My dog was on that for a while and then we found some commercial diet food
with better ingredients (can't remember the name now, as for the past year
+she has had cancer and came off the diet food and onto better quality all
meat stuff, and has gained almost 20 pounds on it!). I think there are
more diet foods for dogs than cats, but you might want to go to a pet food store
(one that sells high quality stuff if there are any near you) or go to a site
like Waggin Tails online, which sells high quality foods over the internet
(don't know the URL but you should be able to find it by searching).
Waggin Tails will communicate with you by email if you ask them if they have any
good quality diet foods.
Michelle