I have a male grey squirrel rescued at around 4 weeks old in march, had an accident where he claimed a broom handle and it fell on him. Looks like head trauma, blood coming from nose and some on his eye. Went limp when it happened. We are distraught he has seemed to recover a bit and has walked and is laying now had some heavy breathing and has calmed a bit now. Is there anything we should be doing for him? Can I give him anything that I might have on hand for pain?