I have four backyard hens. They are around 5 months old. All but one lays just about daily. My first and most consistent layer hasn't laid since Sunday. Since then, she has stayed in the run when I let the others free range and often seems tired. My first guess was that she was egg bound. We injected her with some lubricant. Still no egg. She began to have some blood in her stool off and on. I felt inside her cloaca tonight as far as I could while pressing her abdomen to feel for an egg and I felt none. What could be going on with my girl? Her comb and wattle are a nice red. What am I missing?