I have a mother runt pigeon with a baby pigeon that is 2 wks old. The mother all the sudden stopped walking and try to push using her billy. I removed her to a cage and gave her antibiotics for 3 days. She looked healthy and eats and stands up well. I put her back in the loft and she did it again and won't walk. The other pigeons we bitting her as well. I put her back in the cage. Any idea why is that?!!!! Or what to do?!!!!