Hi I'm new to this. I don't know how to mark him as a unknown breed. He's very loving and playful. He loves to play fetch and play with other dogs. He also likes to lay in bed with you and sleep/cuddle. When he's inside he sometimes will play but most of the time he calms down. He does have some food aggression only to dogs so he must be fed separately/in different room. He must go to a home with another dog. He is good with cats. I'm not sure how he is with kids considering he's never been around them but I think he'd be good with them but the kids must know boundaries. He would probably do good with kids 10+. He's a really good boy though. He's about 3 or 4 months old is my best guest.