We purchased chicks from Wilco 2 days ago and they seemed fine. Active, chirping, running around the brooder, eating and drinking. We have pine shavings down and a heat lamp (will be changing to a heating pad) Yesterday one seemed to be having issues-tucking her head between her legs, flapping her legs like she was scratching, but not touching anywhere on her body, and running backwards. She’s tumbling over too. I’m treating with selenium and vitamin e. I think it’s wry neck, but am trying to post a video for any feedback. (It’s only allowing for photos though). Can anyone suggest any other possibilities or fixes? Thanks in advance!