Recently I've had a bunch of chicks getting sick. They are about a month old. They all seem fine at first then they get droopy and stop eating and drinking. They stop eating and drinking as soon as I noticed them droopy and barley moving. I've tried adding some water soluble antibiotics when the first one died but it hasn't helped and I loose about one a day. Does anyone know what it might be and how I can treat it? I'm posting a pic of the newest infected that I found an hour ago