Ok, so I am new to the chicken world. Built a coop, hen house and started getting chickens... I picked up two leghorns (18-24 months old), both molting from one flock, then I got a Buff Orphington (1 yr old) and two pullet Barred Rocks from another flock a week later. I did not read about isolation until after introducing the Buff Orphington and Barred rocks to the leghorns. So now, two weeks later, one of the barred rocks has some diarrhea. It happens to be the smallest of the ladies, and seems that it is lowest in the pecking order. Also, the Buff Orphington began to molt within the first few days. None of them are laying eggs yet. I was hoping that the leg horns, which now seem to have all of their feathers back and are looking very healthy, would have started. Just wondering if the stress could cause any of these issues, or if I need to start checking for worms or some other health cause.