I am really getting frustrated, Dash (my male) snapped at a dog at the dog park today over a toy. I just don't understand how he is fine at home but when he gets with different dogs he gets mad when they try to take his toy. He will never take a toy from a dog just watch it until it is given up, but he will never take a toy from another dog. If someone has any tips I would greatly appreciate it, I am lost. I hate having a dog that is hard to trust, or so I think. He bears his teeth at my female at home and it just means play they have never gotten into a fight. When he is at the dog park I always catch him and make him give up the toy when he does that. Am I over reacting? Is he feeling that I am nervous that he is going to do something? I see other dogs at the dog park that can play keep away and be ok, why can't mine, what did I do differently? Then again I see some dogs that will do exactly what he does but the owners don't do anything about it.

They are both fixed. The behavior that my female shows ( scared of a lot of things, she will only bark not bite or be aggressive, ) I think stem from the breeding. I was very naive when I got my first one and I believe that I got here from a puppy mill and she was younger than they said. My youngest, the male I got from a very reputable breeder. The only thing I can think of is that his dad was a little aggressive.