I have had 2 of my 4 hens die. A 3rd I believe is dying & it's really too late to separate her from her sister. I feel like a failure because I have no clue what's wrong & can't afford a vet. They walk like a penguin & are in obvious discomfort. The poop is black with white. The first one just became listless & was sitting by the pen door all night. In the morning she was dead. The second one started the same way so my son tried to see what was wrong. He told me there were maggots eating her alive so he & dad put her down. Now like I said, the last 2 seemed doomed unless someone can tell me what this is & what to do. I feed them crumble with oyster calcium added by myself, dried worms & spring mix. We originally had 6 but lost 2 in a battle with a Martin(weasel) we got there in time to save 4. Now in the last month they've been dying. One day fine & the next dying. Took about 2-3 days for the first one. The second they put down after 2 days. It's silly but I love those hens & wish I could stop it.