We have a large german shepard/lab mix. He is 9 years old. He seems to have aged overnight. He jumped over the baby gate and didn't quite clear it. He is slow getting off of the bed. He is slow getting up when he has been laying down for a period of time. I was pondering giving some vitamins or supplements or something to help him out. Glusosamine chondroitin? or something of that nature. Anyone give anything to their dogs? Thanks.