My 8 and a half year old newfoundland has been diagnosed with arthritis. He has severe joint pain and this first came to notice when he had difficulty climbing stairs. also he can’t stand for long period of time and has to sit down every 4 minutes for a minute or 2 before continuing. In short old age has hit him hard and i now want to make his life as easy as possible since he has severe arthritis. What can be done?