Ace needs proper training- he is reactive but not aggressive toward other animals. As students and his foster parents, we cannot afford the training he needs. He is perfect when inside or in a fenced in yard, but needs leash training and is reactive when he sees other dogs and cats (barks, howls, tries to approach them). He has never shown aggression when we have introduced him to other dogs, but he actively tries to be dominant. We think he just has no clue how to properly socialize from being in the shelter so long. He shows signs of trauma from his previous home.