Here are some pics of my pullets today and the weird little blood spot where the comb and beak meet:
No. I've seen no attempts to peck outside the run / coop. But that does seem a good explanation given the location of the blood. I don't recall seeing it when I opened the coop this morning. I only noticed it when I went out after breakfast to bring them fruit scraps from breakfast. The bright red was very noticeable then. So, maybe it's something they've done to themselves while in the run. Poking beaks through the wire makes the most sense -- and most of them are just starting to get their combs to grow....I don't know. I haven't seen them doing anything new.