Thanks for the flax oil suggestion. Someone else mentioned it as well.
As for the injured dog who may develop arthritis, I would suggest massage and lot's of exercise. The glucaustimine tablets work good. My dog likes the Hip and Joint tablets in a bag. He doesn't take to other types. His teeth are bad and he can not chew them. I can't grind them up and put them in his food because of the 2 other dogs eat there too.
My dog Scooby had a stroke and was paralyzed on the right side. He has recovered mostly but still has no feeling in his right paw. I hope it does not have to be amputated. The vet said he had a good chance of complete recovery.
I have started an arthritis preventative routine on him as well. I massage and keep his joints moving. Dirtnap is still in the process of allowing me to touch him. His cataracts affect the way he sees shapes and it scares him. He is getting better and understands I am there to love him.
I hope your doggy is doing well. I've got 3 handicapped dogs and they are spoiled rotten!!!