I always get only chicks a mirror and a stuffed chicken mama, and get some day old chicks from a hatchery or somewhere, asap. Are you giving your hatchlings vitamins? And how about medicated chick feed? Broody hen is another great idea, I did that once with an orphaned baby, the broody was only two weeks into her own hatch, but she adopted the baby and took care of it and as it turned out, her own eggs did not hatch.