I have been waiting over 10 hours and no answer from anyone so maybe since it is a holiday OR maybe it belonged here??? so I cut and pasted my post there for help and band aid didn't work the chick still put legs back so I removed band aid. A second chick has hatched from same group of eggs and seems very healthy.
https://www.backyardchickens.com/t/...ng-trouble-bobbing-head-and-trowing-legs-back
https://www.backyardchickens.com/t/...ng-trouble-bobbing-head-and-trowing-legs-back