Its not too late. Work the dog in a pin regularly with a hog. Make it a normal routine. Lots of praise, make it a game like playing fetch or some thing.
Then when you want to hunt take the dog and put it on the ground. It might be slow but the dog may surprise you one day. There has been more than one dog made by just putting it in the woods, checking hog traps, or what ever else. It can be alot faster with other dogs to hunt with it but its not the only way to do it.