Yesterday my husband came out and he saw a grey large bird over our rooster, Elvis. I picked him up thinking he was dead, he is alive! He is just laying around. Kept him in, this morning it was so sad, he tried to do a little crow. So I know he has life in him. I tried setting him on his legs, and one just seems to collapse. Think he must have something broken, but I can't feel anything. He is laying on his back now, one leg seems useless. I am feeding him water, he won't eat yet. there was no blood either. I hate to put him down, don't even know how to, don't want to shoot. He is about 3-1/2 months old. thanks for any help!
It sounds like he was hit by a juvenile goshawk.
For a bird that survived a raptor attack its the equivalent of a small child actually finding a monster in their closet. He'll be stressing over his physical inability to flee in defense and the potential of another assault for the next few days. Once he's back up and getting around he might still have some paranoid behaviour for a while. Once he's up and around again he'll make a great raptor alarm! Chickens that have their instincts reinforced by experience don't forget a lesson learned the hard way if they survive it.