I have done the Littlies but ran out before I could do my big girls. Will be seeing the vet again this week so hopefully sorted then.
It reminds me of what I was seeing in poops at the tail end of treating for coccidiosis. I was brooding in the Common garage like building and picked up some new chicks from my breeder after my dismal First hatching attempt, 48 eggs set and 14 chicks, half boys... wasn’t a stellar start to my chicken rearing. I bought some straight run “week olds”, that were from an order that the buyer backed out of. This is where some people will yell “Quarantine”, but I was thinking as it was the same breeder I got the eggs from there wouldn’t be an issue. Except they had already been brooded at her farm until I picked them up.
I lost one of the chicks the first night to a pre-existing pasty butt (that had had to poop torn off with the bum fluff), and after a week moved them into a brooder adjacent to my home hatched chicks. It was winter here, and I was concerned about putting them out in the weather too soon. At 9 weeks old my favorite pullet from my hatch was suddenly found dead in the brooder, then the bloody poops appeared. This was after a few weeks of having the new chicks in the same room. I am certain between the child here playing with them and the new chicks that there was cross contamination between the two brooders and the coccidiosis was brought in with the new chicks (10/14 were boys too, so that didn’t even really help my layer numbers!)
I started treating with the Amprolium I convinced my cats vet to Reluctantly prescribe for meI moved them out onto grass, and everyone else survived, but I was seeing that pinkish/red goo in watery gelatinous poops for several weeks afterwards. My understanding is there are many different strains of cocci and that they are present, but tolerated, to some degree in most poultry. coccidiosis happens when there’s an overload or a when a different strain of cocci is brought in that your flock isn’t accustomed to. I also now just hatch/brood in the room where my mother stays, so she can keep the little girl from damaging/traumatizing the babies too much, and I bring them up here either into the barn or on the grass outside ASAP.