One of our peahens is acting weird. She keeps opening her mouth/jaws widely. I caught her and looked into her mouth and nothing foreign is in there. I tried to get her to drink water and all she did was just look at me and let the water run out of her mouth. She had energy but i haven't seen her eat or drink. She is in with two other hens and a Peacock. Their share the large space with several cochin bantys, ducks, geese and chickens. Anyone have any ideas?