Is there a pour-on drench for horses on the market? We have quite a few relatively unhandled broodmares who are a nightmare to drench orally. They run in a natural herd in several thousand acres and have limited human contact. Can we do them like we do the cattle? Our vet advised us to use a cattle lousicide when we had lice last year and it worked very well, but as he is away at the moment I can't ask about the drench. Has anyone got any information about this?