i hatched out 8 baby ducks this weekend. Uno was the first to hatch. he stayed in the incubator 12+ hours. it finally got too crowded so i removed the first three to a dog kennel. it was lined with a fluffly towel,folded thick and topped with paper towels. for 12+ hours they slept under their heat plate. once they were active i offered water with electrolytes, eventually added a handful of all flock raiser crumbles with niacin sprinkled on top. he was originally fine, walking and active. but by 36 hours old, one leg is pressed tight against his tummy. like its locked. his foot is cumpled and the knee can not be straightened. i watched a video on rolling the tendon back in place, but i dont feel anything pop back in place. could it be something else, or is my technique wrong?