[Ellie May]

I'd go with glucosamine (Cosequin) if you give anything.

He needs to stay lean and jumping has to be restricted. Whatever food accoplishes this is the one that should be used. Obesity can cause major stress on the joints and organs. I'm not sure what is hard about sticking with one food. Sounds pretty easy? Feed the one food and stick with it. Don't let him pick at it all day. Two meals (or if you want to leave it out all day, measure what he can have, put it out in the morning, and don't refill the bowl until the next day).