I have a about 22 week old Buff mix that is having trouble. I first noticed it about 5 days ago that she kind of limped around a bit favoring the left leg. My son said it looked like her head was swollen a bit on one side, but looks normal now. Then I noticed she doesn't flap her left wing and now just roosts on the ground. She still eats and surprisingly the other chickens leave her alone. Well today I found her flat on her back with her legs up in the air, I first though she had died and then seen her head was turned up right. So i went in and picked her and she went on her way. A bit ago the same thing accept she pecked me this time! The coop is completely fenced in so not likely anything got in. I first suspected maybe she got her leg stuck under the edge of the fence and hurt herself trying to get loose. Not really sure whats wrong with her, any ideas? I found on a yahoo search that a protein deficiency will cause this to happen and to feed her cat food! Anyone?