Any ideas or leads are welcomed. My 3 week olds are in the garage in a playpen with a heat lamp. I just cleaned out the brooder yesterday and everything seemed fine, they are all acting fine eating drinking..today I was inspecting the roost and noticed some dried blood on it. Then I looked more and there is quite a bit in there. It is not "with" the poop so I dont think its from that. I inspected all 5 of them as best as I could a 3 week old flapping chick and didnt see anything. Any ideas where it could be coming from?