My local feedstore only has a selenium and vitamin e supplement in the form of a crumble for horses that is dusted on feed. It contains no copper, and I'm considering using it as a boost for the nutrition of my pregnant ewe. Will this be okay? Are there any other ingredients that I should check for? What would be a recommended amount of Selenium for her? Also, I'm noticing some small breaks in her wool. She's getting a timothy alfalfa hay mix and about 1lb of a grain mix each day. Could she be lacking vital nutrients? Thanks!