Very young chicks do not know about food and water when they arrive. You need to tap on the feeder and water dish, as their mother would do to show them where they are. After one chick figures it out, then all will. Some places will ship small orders ie., "My Pet Chickens," also sexed pullets for an extra price.
Most hatcheries want to ship a certain number per order, so there are enough chicks to keep each other warm. Otherwise they add cockerel chicks to serve as live heat packs. That is how little they value male chicks. But better than destroying ones that won't sell.