Hi- you should add Selenium to the Vit. E. The Vit E. is needed to absorb the Selenium. Being a chick, I would add only a tiny amount. They usually come in a dry tablet. You can scrape off the amount. I have heard that Tractor Supply has some liquid (for goats) that is Vit E and Selnium both. Best to search for the correct dose. I've had 2 with this condition. One (older one) had it for 4 months, and I put him to sleep, because he couldn't be cured even for a week, even with Vet medicine. The chick I had was better in a week, but she recently relapsed when she was stressed getting ready for a show. She is better now, but when they are stressed, they can show it again as an adult. Wry neck is common with Silkies (and the say Polish). It comes from various causes. Some say hereditary, some say lacking certain vitamins (I don't think so, with tiny chicks. You'd think they would cover the vitamins in chick starter). Some say peck on the head. The first one that I had came from a pretty famous breeder that has many happy customers, so I don't think that it was hereditary. Good luck with your chick. I'm pulling for you! _Pam