I’ve had 8 out of 18 chicks die in the last two days. They have all been covered in bloody poo. They’re all around 8 weeks old. However, it seems to be spreading to my older chicks (around 11 weeks) who are separated from the smaller chicks as the small ones are in a cage within the main enclosure. The older ones have bloody poo and a crop full of clear liquid which I’ve tried to drain. I believe it’s cocci but unsure. Any diagnosis or potential treatment would be appreciated.