aggressiveness

Hi all. I have a darn near perfect Aussie/German puppy. She's wicked smart and takes to training like it's her job (it is). My issue is socialization. We go to a dog park every day, and have for 2 months. She will not play with other dogs at all. If I do she snaps at them protecting me. She's...

So my dog is a very, very nice dog if he knows the person. He is very friendly and loving but if for example I tie him outside a store while I go in quick and someone tries to pet him he will either show his teeth or try to bite the person, only when a stranger tries to pet him. He usually...

Lately, I've started watching "The Dog Whisperer" and "It's Me or the Dog" (although it's so hard to find these series online *sigh*), and seeing how certain people owns big dogs while they can't control them (and their aggression) is really shocking! Some of them are aggressive towards other...