What did the vet say? Why did you decide not to opt for surgery at the time? She must be in agony, poor dog

Dogs are very good at hiding pain, but if he will not use the leg normally that is probably a sign that he is in pain. He may well have arthritis in his hip or knee. I'd ask your vet if you can try him on metacam for a couple of weeks - it's a painkiller and antiinflammatory. If he starts using the ...

I would go back to the vet, and ask for a referral to a specialist. They might be able to help her.

Poor Stymie! Rotties and rottie crosses seem very prone to cruciate ligament disease Which surgery did he have?