I was cleaning the coop and on the roost bar was a dried poop with an obvious blood ring around it. This was two days ago. I haven't seen anything else, but it would be difficult to see in the shavings and sand. Chickens are acting fine. The door to the run has been open the last few days, (new event) but they take infrequent short visits out there. There could certainly be small bits of wire from the fencing that they could have eaten. Is this something I should do something about? Something I should watch? What am I looking for?