I think one of my hens is sick. She's a Brahma, almost a year old. She's been acting almost lethargic, now I see poop near her vent, like she's not quite lifting high enough, and she nearly lays down when I pet her (not squatting, further down) and is slow to get up. She showed no interest in bread this afternoon, but went after scratch. She is laying (I only have two hens and had two eggs today). Any ideas? Other hen is acting just fine. I had a third, but she had similar symptoms, but worse, just after Christmas and died of an apparent heart attack when we tried to clean her vent.