There is a dog food out there which is advertised as being lo-carb, for older, heavier dogs… I think it’s Pedigree. The whole concept of an overweight pet that needs to become slim again is just strange. In fact the fact that pets can become overweight is weird! Sure, there are fat cats, but it just seems like animals should “naturally” be their optimal weight, and if they get fat, then something is seriously out-of-whack with the owner. (Special medical conditions of the pet excepted)