We have a Ruffed Grouse visiting with us. It was found on the ground not flying and a little under weight. We found nothing wrong so we are fattening it up and we'll see if it will pass a flight test.
What's most interesting is that part of it's protect is to be perfectly still whenever something threatening comes near. It has that down pat. Everytime we look in on it it's as stiff as a stick. I didn't have to wait for it to sit still to take a picture either.