Well I just got back from picking up my new horse. He is not in the best of shape I am sorry to say. He is very thin, dirty,has been beat up by another horse, has a lot of dandruff, and maybe hass lice the seller told me as I was driving away with him. I am putting him on nutrena Safe Choice feed, (with a little sweet feed mixed in until he gets used to the new grain). It is still too cold here to bathe him but I have groomed him extensively and he has tons of dandruff and seems to be very itchy around the face (and is losing a bit of hair on the face and crest of the neck). I have been researching these issues on this forum and have learned that lice mostly come on animals that have depleted their vitamin A. Some posters have suggested injecting horses with vitamin A. Can someone give me more advice on this please? Is it something I can buy at a feed store and squirt in their mouth? Or are there horsey vitamins or something I can get? I have never even heard of this before.