ive had them get that way, and it could be several things, i think sometimes they eat something poisonous, like lead, if you free roam them ... but the ones ive recovered were not eating much and maybe just roosting in the coop most the day .. so i treat the water with some merks liquid dewormer, and then near to where they are, i break out the treats, bread is the prized treat around here, and entice them to eat by feeding the bread slowly in little pieces to the others .. hopefully the action will attract them to want some .. get alittle high energy treats in them and then theyll drink the water and then hopefully theyll start to recover over several days
