Aw poor Barley. I hope that he heals quickly. Have you looked into the stickies on spaying and neutering on the forum? I'm no expert on dog behavior but I'm sure someone else will chime in-- If it were me I would let the owner know to make her aware that he may have aggression issues. Hopefully she will offer to pay the vet bill. I would also avoid Locchi. I would not neuter my boy until at least 12 months personally but I think it's up to you. A lot of people neuter at 6 months. But there could have been a lot of other reasons why that dog attacked Barley. He could have leash aggression or dislike puppies. It's unfortunate that it happened. let me know how it goes at the vet!