I have 8 Marans who are beginning to lay for the first time- just began this past week. I’ve found 3 whole eggs, 2 thin shelled eggs that collapsed, and 3 stools that have large amounts of dark blood in them. All of this in the nesting/roosting area. Is the blood normal for first time layers? I’ve checked vents and chickens for injury and nothing. No one is pecking at the others. Everyone is perky and eating and drinking.