I've had a squirrel for almost a month now. He recently has taken to chasing me whenever I left a room (I would let him roam free at least one a day on our enclosed porch). The door shut on some part of his body 3 days ago. Since then he's been dragging his hind legs (though I've noticed some movement in the right leg when he's laying down). Anyway just now I looked and the left side of his belly is visibly large and firm. Like someone put a grape under his skin. He is also pooping more than normal. Like 8 pellets in a couple of hours (firm and dark brown in color). Does anyone know what might be going in and how I can help? His behavior also seems normal for him, like I don't see any signs of pain and appetite is normal.