You want to stick a hatching chick under a non-broody hen? Don't even think about it. Way too risky. The hormones that trigger broodiness also trigger the maternal instincts to care for chicks. Without those hormones, she will likely kill the chick. And just because a hen goes broody, is no guarantee of her being the mothering type. Some hens kill their chicks the second they hatch, some are completely clueless when it comes to taking care of chicks. If you really want to add a rooster to your flock, let your friend hatch the eggs, then pick the chicks that you would like. Brood them indoors and integrate them into the flock once they are old enough.