I have one big male pigeon that is trying to take over a nest of another pair. They have squabs in there. This bully pigeon goes in and stamps all over the squabs and fights with their dad.. but the dad is not as strong as the other pigeon so can't get him to leave the nest. I made a cover for the nest with only one small hole big enough for one pigeon to get in at a time.. thinking that the nest owner could sit in the hole and not let the bully in. But the bully waits till the dad goes to get some food and then goes back in there and when the dad comes back it won't let him in. I had to watch whats going on all the time.. as I don't want him to hurt the squabs. Today he started attacking the female of the squabs... waiting until he sees her go in to feed them.. then he rushes into the nest and chases her out even with her mate trying to protect her. So he won't let her feed her young at all. Is this common behaviour? You will be please to know I have caught up the bully and put him into a cage in the loft on his own. He is really mad and jumping about In the cage and grunting. He is frantically flying at the sides of the cage and I am worried he will damage his feathers or get a leg or wing caught. The other pigeons in the loft seem to think this is what the bully deserves. They have all gathered around the cage to look in at him.. knowing that he can not get to them to peck and chase them as he usually does. I think they are laughing at him in their pigeon way.. lol.. I can't keep him in there for ever... any advise about what to do? There are plenty of other nesting boxes in there... but he really wants that one and seems determined to get it.