I am starting to have the same problem with my squirrel Charlie, he will be fine and happy running around in the house, then when I get ready for work he will start pacing by the window. I went go put him back in his cage before work and he bit my thumb and chattered his teeth and continued to jump on me and chatter his teeth in my ear, so i got a blanket and gently put him back in his cage. Im at a loss what to do. We have a lot of animals around the house and i know i would be setting him up for failure if we were to release him. I just would like some advice on what to do. He is a 3 month old grey squirrel.