I've had a pair of pigeons for about 6 months. New to this pair. I traded my pigmy pouter pair ( from a swap meet) for a parlor roller pair at a swap meet, and I've had this new pair for 3 weeks. I love them! ....SO... here's the situation. The pigeons have lived in an enclosed aviary which was part of our lanai, for the past few weeks. The floor access is 25 sq ft., and they have a ramp up to a guinea pig cage, covered in small gravel & coarse sand, where I put them at night. I cover them as well. I'm nearly done with their starter loft, but about a week away. My female roller just laid her first egg yesterday, on the pebble ground of the aviary they have, and I have no idea about them setting. When I put the egg up into their cage, and then them up into their cage, for the night,the male acted really alarmed and he walked over to the egg and stood over it for a while. I checked feed & water & left him standing over the egg, which is on the pebble floor. I have an almost done nest box with a sliding door. Should I put the nest box on the floor, with the egg in it? Nesting material such as straw, wood chips, anything? Does the male incubate in turns with the female? What kind of set up do they need? More generally, do pigeons only lay eggs when they intend to raise squeakers, or do they lay regularly anyway, like a chicken? My pouters never laid, and they had the same space.