As a class project, my pre-k students and I incubated 9 chicken eggs that were donated to our class(different breeds). Eight hatched without problems. The last chick was slow to hatch and I assisted him/her. I thought the chick would perish overnight, but miraculously, it made it. However, it has trouble manipulating one of its legs. It seems as if it has trouble with the muscles in one leg. I am not sure what to do. It is 3 weeks old and is hobbling around, gaining weight, and is accepted by the others. Do I just wait and see what happens over time? My concern is what will it do when it starts gaining more weight? Any suggestions? The chicks currently reside in my backyard.