My neighbor walks her 2 poodles every morning and also pushes a stroller....when the dogs get tired of walking, they hop in the stroller for the rest of the way! She is fondly called "the Stroller Lady" in our neighborhood.

Loosing a pet that has been with you a long time is never easy. And seeing them go downhill is even worse. You tend to feel very useless.

Is it Tubby that is on the Cosaquin? (sorry I can't remember) I've doubled the amount that Fluffy takes, and it really has helped him out. Its worth a try, it won't hurt him either.