I have 6 hens in a large coop 3 light sussex 3 cream leg bars they all recently had a lice infestation which after weeks of constant spraying, cleaning and powdering has now been cleared. Now I have a new problem, over the last few weeks I've noticed bald patches on my girls, under their chins, down the front of their necks, around the vent area and above their legs/under the wings?? I have watched them and haven't noticed any pecking or pulling out of feathers from anyone bird, so assume it happens whilst in the coop at night/early hours. They look very strange and scruffy the Leg bars are the worst off, no soreness or blood as yet but its not right. Any suggestions or advice please because Im puzzled???!!