She's a blue orpington and these are regular-sized standard eggs. She sat on just 2 eggs before and they both developed. One made it to chick-hood. I now have her on 7 eggs and she's doing fine with those. They're all candling well. Thing is, I won an ebay auction for 6+ eggs and they'll be here in about a week. Those other eggs will only be about 10 days in toward hatching. Can I slip these new ones under her and have them still fit? I suppose by then, I might have to cull a few eggs that aren't developing anyway, but it still makes me wonder as to how many would be her limit... any idea?