Apollo grows and barks, bares his teeth and even puts his hackles up whenever he sees Sam's cousin, Zac. Apollo, Sam, and the ferrets are staying at Sam's aunt and uncles house (where his cousin, Zac, lives) We have NO idea why apollo growls at Zac like this. I'm kinda upset. We are lucky to have them hosting apollo in their home, I don't want apollo's behavior to make them say "he can't stay here anymore". I don't think that they would say that, but still, I'm embarressed that apollo isn't being a better houseguest. Any ideas why he's acting like this? He's NEVER behaved like this before. We are baffled. Zac is a great kid. No different then anyone else. He's calm, quiet, and loves dogs. Why on earth does apollo act like that around him? Its nuts. He acts like a totally different dog! I see no reason for him to NOT like zac. Zac is a teenage boy. He doesn't wear any colonge or anything. He doesn't wear hats or act crazy, agressive, or loud. Why on earth is apollo doing this? I'm kind of upset. Any ideas? TIA.