Is my chick sick?

[volderman]

Hi so I got 3 baby chicks about 4 days ago. All are very perky except one. This one is sleeping but constantly chirping. It seemed fine yesterday but today it seems lethargic. Even when I pick it up it wont squirm like it used to do.My other two chicks are just fine they walk around and seem healthy as can be. So is my chick sick? If so what should I do?

 

[sunflour]

Try posting this also in emergencies to get experienced comments. Make sure the chick is drinking and check for pasty butt.