This morning my segregated mama hen with her one chick was surrounded by mama feathers in their coop run. They are from her tail which looks a naked but a normal pink. It is not the outside tail feathers just the inner feathers so not easy to see. The chick is normal and both are feeding well. They can see the other flock mates but not access them. We are incredibly lucky with not having a predator problem (hawks yes but no mice, rats, etc). We are also currently lice/mite free. I missed her second feed last night but she enjoys a 4m x 4m garden with tree and grass. I did notice the water container had been tipped over and was empty which hasn't happened before so I will change that. I wonder if it was tipped in a frakas but can't see any sign of a predator which would have disturbed the other coop mates laying (they have a mesh door separating them). Any ideas why? My experience with chicken problems is close to zero as I inherited a flock that seem to get on with life just fine.