It looks like blood to me, too.
@Whistlinghill you need to verify it's blood in the poop sample.
I may risk upsetting someone, but it just drives me crazy trying to offer help when people asking for it don't tell us where the heck they are located. Geographic location offers us so much information and eliminates wasted time asking these types questions.
For example, a person from coastal Oregon or California or Florida may be having spring-like wet weather and coccidia will be blooming. It's one cause of poop pictured above.
Also, telling us how the chickens are behaving helps a LOT.