How to tell if a chick is in pain?

[meowlacy]

I have a 3 day old chick with what I think is a slipped tendon/hock dislocation.I am unable to fix it . I have hobbled him which seems to help. He eats and drinks but doesn't move allot. How do I know if he's in bad pain? He doesn't peep unless I try and move his leg. I don't want to let this poor guy suffer but not sure if he's in pain!! Please help.

 

[Judy]

They hide symptoms instinctively, to protect them from the rest of the flock, so it's pretty well impossible to tell from outward signs.