Two days ago I lost my young hen. She only showed signs of sickness the day before she died. I picked her up and noticed how incredibly thin she had gotten. (In less than 24 hours of this, she died). I'm really worried about the rest of my flock now. (All pets) I have one roo, 2 RIR, 5 EE, 3 mix pullets (raised by the hen that just passed) and 4 bantam pullets. All are supposed to be under 3 years (that's what I was told when I acquired them in the spring). Their behavior is more quiet than usual. They will come running, however, if I bring treats. I feed them layer pellets and layer mash (is mash the same as crumbles?). They free range for several hours a day. All seem to be drinking like usual. I can't pinpoint any particular bird with abnormal poop but I've seen a couple really black ones in their run and yesterday morning there was a large semi-solid poop with a bit of red in it. I haven't fed them anything red in the last week. Yesterday I started them with the Epsom Salts in their water and put out a large bowl of plain oatmeal (they loved it). Also picked up plain yogurt last night. Only one that I know of is going through moult. Any advise would be greatly appreciated. I love my birds and am scared to lose them all!!