One of my 7 month old Plymouth Rock hens has suddenly started to roost on the floor of the coop and the other chickens are aggresive towards her. The feathers on the back of her neck are not fluffed up like usual, and I can see her skin. Her comb also seems to be shrinking and is not bright...
Should I worry about a hen that has suddenly started to roost near the floor of the coop? The feathers on the back of her neck are not fluffed up so I can see her skin, and her comb may be smaller than before (I can't remember if all the girls had large floppy combs).