[cypher]

It does sound as though your ham may be arthritic now, the pain meds, usually metacam can help them with any pain & make things more comfortable for them. I sounds as though he may possibly have had a stroke which isn't unusual in elderly hams. There isn't much you can do about that now but I agree asking your vet for advise now & making it as easy as you can for him to get around the cage is the best you can do.