question about babies.

I have had some pet pigeons for a couple of months now and I had some questions about egg laying. I have bedding and nesting places for the pigeons and one of the females layed two eggs within the past few days. For some reason whenever we checked on them she wasn't laying on them. She was near...

My new arrivals are about 3days old.. and from hatching, one chick has always had more yellow down than the other. Is this indicating that the chick with the least amount of down is, sick? or weak? Thanks.