Emergency 3 Week Old Pigeon Question!!

[jbcanne]

I have two baby Roller Pigeons that will be 3 weeks old Tuesday. Both are in good health with one being alittle bigger than they other. Both born same day. Today I noticed the smaller one (Bald guy) out of the nest and his skin alittle red/maroon. I went ahead and put him back. I checked back later and notice him out again and now blood on his wing. I then took him out, cleaned him, then put him in a small heated cage of his own. Now after turning the coop camera on. I noticed my cock Fantail coming in and pecking the other baby out of his nest. Why is this? The nest is not next to where they perch. The Roller parents will not come in or help. I noticed the Roller parents don't even sit on them during the day anymore. Is this normal? I now have both in the heated cage in my home and will have to feed them myself. Now.. the Fantail is fighting with the others..?.. Could he be setting up for his hen to lay eggs? Did notice for the first time today them perched tight together in the same area as he sat over her. Just curious why after all this time I now have to take the babies out and the parents doing nothing.