Stupid Dog

Mom: Leath is very stupid. I wanted to take him to Ohlone to walk. So I asked him to jump up to the car, he hesitated and looked at me like "are you crazy". So I thought maybe he is too old to jump up. I took your ramp out, ask him to walk up. He refused. so I tried to help him and push him up. He like one leg in one leg out, could not keep himself straight. after two three struggle, he gave up and run away. How difficult is this? I don't understand. Did other dog has this kind of problem? We end of walked the same old way, long one though. The one he likes the best. All the way to Old Mission Park, pass there, turn around coming back, to Mission Blvd. Boy, this old dog can really walk. How many miles this?