health and growth

Question
hi i owned a saint bernard puppy which is 8 months old he had a problem in his legs the problem is that his legs  shevers and his front has little bit problem in the jointsand we stay in a three stories and he fears to climb the steps up and down day by day it becoming very problem to me and to his walking or jogging can u suggest me a solution to this problem

Answer
this problem needs to be addressed now. He needs to see a vet. Ensure he is being fed a premium quality LARGE BREED puppy food and absolutely NO CALCIUM supplements. He may have hip and elbow dysplasia which will require surgery, please take him to the vet