What does your hatchery do with extra males and other chicks that are not adopted?

We do understand that other hatcheries may do things differently than we do--did you know that chickens are not protected by the Humane Slaughter Act the way other "food" animals are?--but we wouldn't be able to sleep at night if our hatchery engaged in those practices. The majority of the baby chicks that aren't adopted are offered up for auction near our hatching facility. A portion of the unsold chicks are humanely euthanized and we are continuously looking for better alternatives.