I just bought these 19 week old hens ready to lay last week. Today I noticed one having problems with her neck. I did a video, I'm hoping the link works, she suppose to be vacanated against mareks disease. She seems healthy, eating, drinking, and still gets around. She also started laying beautiful solid eggs. I looked at some videos online and non that represents Mareks disease doesn't seem similar to her. I'm not sure if she may have been injured during her transportation to our island. It would take a whole day crammed in these crates to get here. Another one I got had a sore on her back. Here's the link. Thanks for any help. http://s863.beta.photobucket.com/user/epwand/media/New Hens/DSCN2765_zpsb34d4973.mp4.html