In the last week I have lost 2 of my chickens. Marlon was the first and Goldie was the second. They both were very active and then just took a turn for the worse. Marlon stopped walking around and the others started to peck at him so I brought him into the house. Two days later he was dead. The following morning when I went out to check on my chickens after I had buried Marlon the day before Goldie was dead and pecked. I immediately removed what was left of her from the run and buried her. That was on Saturday morning. Saturday late afternoon I noticed that Buffy was starting to lay around also. I immediately brought her into the house to isolate her from the others and she has refused to eat or drink since. I am scared of losing yet another of my children in less than a weeks time. Marlon was about 3-4 months and Goldie and Buffy are ~5 months. Please help. Oh yeah all of their poo looks normal so I have pretty much negated the option of cocci. I also added some new birds last weekend but they are isolated in another pen till I can figure out what I am going to do with them.