Hi please help. Our 13 month entire male is becoming increasingly aggressive to other dogs. Mostly he is really chilled around other dogs but sometimes he growls and today actually went for another dog- a young male lab puppy. It can be other dogs but young male labs are pretty guaranteed to make him aggressive. He is so sweet and chilled the rest of the time. Two questions really- how do I train him out of it and also is it because he is entire? Thank you!
