My 2 year old hen has a very pale comb. She also seems to keep her mouth slightly open most of the time that I watched her today. However, she is moulting. Is she just weak from moulting or should I be concerned? I do plan to worm her tomorrow and will be worming with Safe-guard in the water .... just in case it is gape worm. Any thoughts on this? The rest of my flock looks/acts fine and no one else seems to be moulting.