As I was about to take the roo out of his misery, my wife say "let me try something." Being she is a nurse I gave in. She liiked at the x-ray she had and got two magnets and placed them on each side of the neck. She worked them up toward the beak. she felt around and said it was moving. So she worked them again and again, until she could see the screw. She them took a pair of twezers and pulled it out. the vet told her it couldn't be done, so today she mailed the vet the screw. I hope he will refund some of his bill. But he still can't crow, but he is now eating and drinking.