6wk old BLRW chick Wry neck or Mareks?

[Pooders5]

Hi everyone
I have a little roo(i think) that on saturday morning i noticed was looking at the floor with a funny twist to his head. At first it looked like he was just looking at his shadow because i just moved him and three others out to the coop. By sunday the behaviour was more pronounced but he appeared to be eating and drinking. Monday morning he was in a corner with his head bent under and unable to stand.
Now in the house and i have started him on poly-vi-sol ,selenium, vit e, and watered down gateraid. He will eat mash of crumbles and yogurt. Any ideas out there of what i am dealing with?
Thanks !

 

[Eggcessive]

How old is your cockerel? Wry neck can be a symptom of vitamin E or thiamine (B1) deficiency, head injury, or certain diseases, such as Mareks and others. Do his legs or wings seem weak, or lame? A chicken sling or chair may be helpful to get him up and in front of water and food. Here are examples of those:
https://www.backyardchickens.com/threads/versions-of-chick-chairs-please.1166308/

Here is a good article about Mareks disease:
https://www.backyardchickens.com/articles/the-great-big-giant-mareks-disease-faq.66077/