Hi all. I recently got some chicks from a breeder. All of the sudden they have just started dying. I've contacted the breeder & local feed store and everyone is clueless. The chicks are under 4 weeks old. They become lethargic, stop eating, have bloody stool and then die. There's no sign of a respiratory issue, eyes, feathers, vents are all normal until the symptoms start. It is so fast. They will go from normal to dead within 10-12 hours. Any help is greatly appreciated.