Leash-training your older dog is also a possibility. Choose a training collar or a harness rather than just a normal leash so your dog can get used to the feel. It shouldn’t be a game of who can pull harder either; rather you should give your dog a short, quick yank to let him know that what he’s doing is incorrect. Starting in your yard is a good point to begin because it won’t be full of distractions or things your dog will want to chase. With leash-training, it could be easier to have a trainer help you with this process. Older dogs can be a little harder to control because they may already have negative behaviors in place, so having a professional by your side can make the training easier.
Patience is key, but every dog can learn new tricks with a little time and love.