bloody poop in chicks

[dadsgirl]

i have some 4 week old chicks, and noticed today very bloody poop in pen. what causes this??? and what can i do /? thanks, angie

 

[speckledhen]

They have coccidiosis, most likely. It's a protozoan, quite common, especially this year and you need either Corid (concentrated Amprolium) or Sulmet, a sulfa type antibiotic. Medicate them ASAP. I'd recommend Corid first then if they haven't recovered, use Sulmet.
Cocci is in the soil and they will outgrow their susceptibility to it eventually.