What's UP?

Brutus has been acting strange for a few days now, actually since Sunday.  We can't figure out why or what it is, but he doesn't want to go outside by himself, and when he's out there, he just keeps looking UP.   We have tried to figure out what on earth it could be:  Did something fall out of the tree and land on him?  Did someone throw something at him?  Maybe a Big Hawk flew down and tried to swoop him up, but realized he was way too chubby to get!  Whatever it was, he's scared.  Maybe he needs Dog Therapy.  Poor little guy.