Many years ago I had a pair of buttons and had them in with my finches. Never had babies but she layed lots of eggs. About 2 months ago I had the chance to get another proven pair. Then shortly after another pair. We fixed them seperate pens up with nesting area. The first pair mated and momma went to sitting but a short time later gave up. Didnt have incubator at that time so lost her clutch. About a week later the other hen started chasing the male around so took him out for safety reasons and the hen went sitting. On friday the 13 2 eggs hatched. She was sitting on 3, last egg never hatched. One of the babies passed away, I think got too cold as I found it laying in the bedding. Mom and baby are doing fine. Just thinking how lucky I was to have both hens sit for me after hearing most don't. A few days ago the first hen went down. She can not walk. I have put her in by herself with heat. She seems fine, alert, drinking and even going potty. I am not sure what else to do. Any advice?? also...how soon can you tell the sex of the baby? We have 1 pair of silvers and the other pair is the wild color.