I have two terriers, one’s 1 and the other is 5. The younger one ( Bailey ) is already used to being in my room and at no point has jumped up onto the cage. The older one ( Scout ) on the other hand, whines and barks when I try to teach her it’s bad to jump. I go to school, and my guardian says it’s necessary to keep the door open so that it’s not a sauna in there. I normally leave at around 7:15 and come home by 4:00. Any help would be appreciated with training Scout.