Have a pen with 9 yellow buffs and 1 EE. they are 3 months old. tonight when i went to feed them i noticed a hen and a rooster with there head on the coop floor. they have no energy and just lay on floor. they are in an indoor pen, off the floor and well ventilated. breathing is fine, poop is brown and runny. they were fine this am and now they look like they are on deaths door. I seperated them from the rest of the others. anybody have any ideas as to what course of action i should take. they are still on medicated starter and i don't see any blood in poop. at a loss. they have not been wormed yet either. did not come to feed when i fed them. any guesses?