I have a broody sitting on a clutch of eggs right now, we're expecting them to hatch around the 21st. The problem is that we have 1 rooster and 15 hens. He's really good about all his rooster duties except he doesn't seem to mate very often so we aren't expecting a large hatch rate. I'm wondering if as soon as the few start hatching if I run to the feed store and grab a couple more chicks can I put them under her that evening and will she accept them as her own? The chicks at the feed store would probably a couple days old so a few days older than the chicks she hatches. Thank you!