My name is Captain!

Copper is a loving loyal companion with some issues that need to be worked through. He is a decently trained dog that we are fostering after rescuing him from a bad situation. We think the previous handler was not experienced, possibly abusive, and neglected to socialize him. Copper is receptive to treats and toys. He has a mild temperament around the house, but is easily excited by passing dogs and people. I think he could be a great service/working dog with the right handler, but they would need to work through his issue with fear-based aggression towards people and other dogs. He has been muzzle trained. He has tried to bite a trainer while he was with his previous owner, but I do not have the details on what exactly happened. Experienced dog handlers only please. Copper will not do well around children and cats until he is more socialized. He knows basic commands and will come when he is called in the yard. He loves playing with balls, tugs, and will bring toys back when thrown.