Our 8 month old cocker spaniel was attacked by another dog earlier today. It had done it to other dogs twice earlier and the owner kept letting it off its lead again. Other dogs have had little goes at him before but not nearly as badly and he's just run back to me. But today, he was snarling back which was quite unpleasant to see and terribly out of character for him. He's fine and happily carried on playing with my friend's dog afterwards. Should I be concerned that he fought back a bit or happy that he stood up for himself! It's both confusing, upsetting and makes me angry that it happened. He is very unconcerned!