Two days ago one of my hens showed unmistakable signs of broodiness. She's sitting on a clutch of 9 fertilized eggs from several flock mates, including her own. I would like her to hatch chicks. She's successfully done it in the past, at her previous owner's. But yesterday afternoon I saw her walking around and the eggs were cold to the touch. This morning she's back sitting on them as if glued on. Could the eggs be ruined from cooling down? Should I throw them out and try to collect a new batch to stick underneath her?