Golden Retriever limping after hunting, Carprofen not helping. Why?

Thank you for using Petco Pet Education Center, formerly Petcoach! Levi definitely could have hurt himself while hunting - he could have caused some soft tissue damage (damage to the muscles or ligaments) or a fracture (broken bone). X-rays would be able to determine if a bone is broken or if there is damage to a joint. He is a little bit young to have arthritis, but it is still possible. It is definitely concerning that the carprofen did not help him, as it is a great pain reliever for dogs, especially for bone/joint pain. A few other things that could be going on are a tumor of the bone or a disease transmitted by a tick. Because Levi was hunting, it is very possible that he was bitten by a tick (he does not necessarily have to have a tick on him at the moment). Ticks can transmit many diseases, including Lyme disease, which can cause limping. A quick blood test could rule this out. In the meantime, I recommend keeping Levi as quiet as possible - definitely no hunting until the cause of his limp is diagnosed. I hope this helps!