Popping the vitamin E capsule into the beak is much easier than dismantling the pill and dealing with the oil at large. Chickens have no problem swallowing pills as many humans do.
Getting pills into a wry neck victim requires holding the chicken and coaxing the head back into a normal position. It can be done with a little patience.
I am treating a wry neck chicken currently. She has a tumor on her head causing it. She gets a total of five pills each morning, E, selenium, B-complex, tumeric, and vitamin A, and one vitamin E in the evening. Her wry neck is very serious and recurring. But, she has no problem swallowing all the pills. And yes, the pills are definitely helping her. She now eats and drinks on her own and is getting around quite well. However, at her worst, I had to tube feed her to keep her from dying of starvation and dehydration. You may need to do this until your hen can eat and drink on her own. Are you prepared to do this?