I have 4 hens, they live in a house that's 1/2 chicken wire under their perches, and 1/2 wood with pine shavings. Fed regular layer feed, they have plenty of water and have been laying regularly, given the season (about an egg every few days, each). I just noticed 3-4 droppings that are redish on top instead of white. Also noticed one drop of blood under the perches. Can someone please help me identify what the problem might be? It's been very cold out, but they have a heat lamp at night, and seem to be doing just fine (making noise, hopping around, eating, etc.). I fed them chopped up cilantro, parsely and peppers, and diced summer squash this morning, which they seem to have all eaten. I'm worried about my little chickies. Thanks for your help!