Usually you start with paper towels, until the chicks know where and what food should look like. Otherwise they tend to eat shavings. If they are eating well from the feeder, you put the shavings down. If they start to fly out of the brooder get a wire top that you can shape to fit it. Young chicks that fly or fall out, won't be able to get back to safety and can end up as dog or cat chow.
Welcome to Backyard chickens.
Welcome to Backyard chickens.