we've had problems with murphy being aggressive to stangers. he actually tried to bite someone last weekend. i think he is very protective of my husband and i, and he also has fear aggression. (we think). we are thinking about using a muzzle when he is around stangers. what does everyone think about this? we are trying everything we can to keep him. we are really worried b/c he is so unpredictable, and i don't want him to hurt anyone. what is your advice on muzzles and just the entire situation?