Funny this should pop up was thinking of getting mine done. But his 6 now and doubt it would help. His a pain on a lead and other dogs that are well behaved go nuts when they see him. My mate has a male greyhound that hardly ever barks and is the most well behaved dog. I said lets meet for a walk on the road both on leads. His dog saw mine coming from miles away and kicked right off. They spent the whole walk wanting to get at each other. I have given him hard time but it didnt help