I would be giving the chick B complex vitamins or chick vitamins and food/water now. Those can be of help with leg problems. But I think the right leg may have a bone deformity that may not be able to be corrected. Some chicks can get along even with a disability. Varus valgus deformity can occur in one or both legs. A twisted leg is also possible. The two chicks in the pictures below did not survive after the owners tried splinting and other measures.