There are several ways to get Vit E in to the chicks but my favorite is to simply squirt a 400iu Vit E capsule in to its beak. Easier said than done the first few times but it gets easier I promise. You can also buy Vit E with added sellenium since that helps the body absorb the Vit E. Many that die do so because they can't get food or water. I do use a syringe and slowly drop 2-3 cc worth of water in to the chicks mouth with a little vit water a few times day. If the symptoms persist for more than 2-3 days where the chick still can't eat I will make a slurry mash and squirt it in the chicks mouth after I give the water.
Give the Vit E until the symptoms are completely gone. It is usually a week but may go on for 2 weeks in bigger/older chicks. The faster you catch this the easier it is to fix.