I have a 9 week old RIR cockerel. Last night he was fine. This morning his neck is twisted. He held it up a couple of times while I was checking feeders/waterers. I carried him in and put him in a chicken hospital and helped him drink. He's keeping his head almost under his tummy and rolled over a couple of times. He keeps his eyes closed a lot. Is this Marek's? What do I do? Is it contagious? I am at work now and won't be back to help him until 4:30 unless I run home on my 30 minute lunch break. I have isolated him from his coop mates. I hatched them (8 mixed birds) from my flocks own eggs. He hasn't been anywhere except my place and I haven't had any visitors in the barn.