Thank you so much for the advise of the pigeons kicking the eggs out of the nest. I think it was just because they are young and didn't build the nest securely as I separated the odd male from the two nesting pigeons and then saw the eggs falling out of the nest again when the female flew out. I have now put something in front to prevent this. But now I just want to know why the one bird (I think the female whose "foot" was hurt ) is now nesting on the floor of the coop although she walks quite normally when feeding or drinking water. She was sitting on a perch even when the "foot" was sore so can't be that. Then I also want to know I want to let them start flying freely once it heats up and the snow is past can I just leave the door of the coop open? Someone said they should be quite hungry before they are let lose to get them to come back? Finally must I have a "trapdoor" kind of thing for them or just wait in the evenings to close up the cage.