My ladies have just started laying regularly (off and on for about a month) and this week I found fresh blood on the side of one of the nesting boxes with a clump of bloody mucous, goo stuff. I can't find any blood on any of the hens, nor do they seem to have any unusual behavior. They are still eating, scratching, etc. Anyone have any ideas? I have a couple of times found a little blood in an egg here and there, but very irregularly and not much.