i have two and they were taking turns flying from floor to there cage, its about a foot and a half tall. then i noticed one of the was not walking around like he had before and his wings are down by his side but almost to the floor. i am thinking he may have sprange it. is
How old are these chicks? It would be very unusual for them to injure a wing unless they got caught in something. If the bird has a dropped wing then it may be an outbreak of Marek's disease, assuming they are over 3 weeks old.