I have 9 hens, no roosters. They sleep in a coop but are free to range during the day. About a month ago one hen, I believe that she is a White Leghorn, had fresh blood on her feathers near her bottom. I wasn't able to catch her to check her vent. I found her egg in the nest covered in blood. She is about 1 year old and has consistently been laying one egg per day. I had to go away for the next week so I took a wait and see approach. When I returned she was still acting normal & had a good appetite. I thought things would get back to normal but she has not laid since. I have an Americauna of about the same age but has only recently started to lay. It seems that about every third egg from her has blood on it, even though she appears to be quite healthy as well. What is going on?