We have 6 steers that are a year old. They were eating an 11% feed steer grower from our local feed mill. There was a lot of powder left in the feed trough so the feed mill suggested we make our feed mix up. They suggested crimped corn and bovatec. We want to maintain a medicine free natural raising of the beef and a prime marbling quality. They said the bovatec was a vitamin that would help with the efficiency of corn absorption. My question is by feeding them bovatec am I keeping my diet natural and medicine/antibiotic free?