The breeder should first observe the reason why they are lame, and if it is because of leg diseases, they can be eliminated. If it is caused by sudden pressure or bruising, it is enough to promote the recovery of the leg in the later stage. After the chicks are lame, you can add some calcium to their feed, or let them bask in the sun to supplement the calcium and phosphorus content in their bodies. They can recover in a short time.