I picked up 7 jersey giant chicks at tractor supply. There was one chick that would constantley shake...at first i thought that i was cold or just needed vitamens bc it was the runt of the bunch. At almost 2 months, this chick is still alive but constantley shakes. He seems to function ok with eating, etc. Just wondered what it could be or if anyone else had a chick with temors that never went away.