Every time I go to check on him in his cage he is always laying down and resting and he doesn't jump up when he sees me anymore unless i open the door and call him out. He used to be more active in his cage. His brother who is in a separate cage (they needed to be separated, there was fighting resulting in blood) seems absolutely fine and he is always climbing around. And i can't get the sluggish one (Jemaine) a cage buddy because he is wayy too aggressive with other rats. He doesn't like em' no matter how hard I try. I am getting Kenan, his brother some though. Jemaine seems absolutely fine once I pull him out and he gets to play with me. Is this normal?