90% of goat feeds are made in the same facilities as those of cattle. The thing is goat feeds alone are rarely medicated - and most people who have them as companions get wethers (altered males) who don’t need grain at all. Graining a wether can cause further problems in itself including obesity, mineral stones (esp urine), and hoof/growth issues. Goats are very hardy they can live without grain in most cases, the exceptions are meat breeds whom need the calories to grow fast and dairy breeds who are being actively milked. Does whom are being bred/kidding rarely need grain as quality hay is best, if condition is lost then add a hard feed.