We added 1 guinea fowl and 10 sex link hens to our flock of 3 hens approximately 5 weeks ago. About 2 weeks ago one of the black hens acted unusual that am when I went to let them out that morning. She would stand in the corner and didn't want to come out. I went to check on her a couple of hours later and found her dead in the corner of the pen. Looks like she just sat down and died in that spot. She showed no other symptoms before that morning. Have been watching the other girls closely since then. Now I have one that has runny poop, seems lethargic, won't go near the other girls and now they're picking at her. She will stand off by herself and have her feathers fluffed up like she's cold. Am not sure how to upload photos but looked at the poop chart and her poop is like that one with white watery stuff and pellets in it. She is the only one with these symptoms. Is it possibly worms? Would like to do something quick for her before I lose another one. These are my autistic son's pets and he was devestated when the other one died. Please help.