@campingshaws , Poly Vi Sol has only 5 IU per 1ml. The Mercks manual says this:
"Only stabilized fat should be used in feeds. Adequate levels of stabilized vitamin E should be used in conjunction with a commercial antioxidant and at least 0.3 ppm selenium. Signs of exudative diathesis and muscular dystrophy due to vitamin E deficiency can be reversed if treatment is begun early by administering vitamin E through the feed or drinking water. Oral administration of a single dose of vitamin E (300 IU per bird) usually causes remission."
My capsules are 1000 IU, and I think I gave each chick a couple of drops. They were better a little the next day, and 100% normal after a second dose.