If you put waterers up on blocks (I use 2x6 wood blocks, adding more height as they get taller,) they probably won't knock them over. OR the brooder might be to small. I agree, I've never seen an all blood poop before. They are indeed at the age where you could be dealing with coccidiosis but I've never not seen a puffed up lethargic chick that made me certain. Check them out to see if anyone looks puffed up ....
Still more blood found in a few spots in the pine shavings, this morning, but no poo or anything else visible, with it. I cleaned out all the shavings, just in case any possible residue could make someone else sick, but I'm not sure it made a difference by that point.
I saw some on the shoulder of Blondie, so I took her into the bathroom and washed the area. Turned out she was just in the wrong place at the wrong time. She's absolutely fine. She willingly let me love on her after that, though, so that was new & unexpected!
Smudge, however, looks "puffed up", like you said yesterday. She's laying down, eyes closing on & off like she's exhausted. The Bluebells ran over the top of her

, so she got up & moved to another area to lay down again. She didn't fuss or anything, like all my girls do when the Bluebells use them as speed bumps.
I believe I've found my sick chick.

I'm going to keep an eye on her and hope/pray if she doesn't get better, at least she's not in pain. That worries me more. That, and it spreading.