Java dove leg correction

Hi All i'm new her. i raise doves for my shows and other magicians. i have just noticed one of my fledglings has a lame leg. he's been sat in a shaded corner of the aviary as with the other fledglings for a few days and i thought nothing more of it. yesterday the others had futtered up to perches and were flapping around happily annoying the other birds. except one. so i went to have a look. his right leg is twisted but at an angle that i cant seem to use the "handcuff" method for. Any advice?