I have recently acquired approximately a dozen chickens of several different breeds. One is a dark read in color I have had one of them die in the night of unknown causes and another that we put down because she didn't seem to have any desire to move and wouldn't eat, drink, or get up on the roosting poles at night. She also had runny yellow diarrhea. I took her out of the pen because the others were pecking at her and now I have a third hen that's starting to show the same signs as she won't come out fro under the nesting beds and doesn't see to have alot of energy. One thing I have noticed is that they all seem to get really fat when they start getting sick. Can anyone help me figure out what is wrong with my chicken. any help would be appreciated as I can't afford a vet. Thanks in advance.