Funny story time:
My husband and myself just bought a place with 20 acres using an FHA 203k remodel loan (as the house needs painting and has no carpet or other floor covering). We are staying in a camper while the contractor fixes the house. So, we moved our chickens to the barn the evening before yesterday. They were in a closed room the first night, listening to the pigeons on the roof above them (two roofs, one wooden one that ends at the rafters and the edge of the rooms, and the main one, so there's a gap where pigeons have been living in the barn) Let them out in the morning, and came back after dark. Found almost all of my adult chickens roosting in various parts of the barn. I also found the body of a pigeon; I assume the rooster took care of it. I didn't hear any other pigeons. Solves that problem (and saves me the trouble of using a pellet gun on the things; pet pigeons are fine, but I don't want wild ones in my barn).
Counted birds after removing the pigeon carcass; I was missing a few younger birds and one pullet. I was worried, but I told myself they probably bedded down elsewhere and went to bed. I found them this morning. They were roosting on the pipes and axles under the camper. Guess they wanted to be closer to Mommy? (now you know why I told you about staying in the camper.)
Will need to build chicken pens in the near future, but at least the majority are safe in the barn.