Glenn Selk, Oklahoma State University Emeritus Extension Animal Scientist — Summer often becomes a busy time of year for ranchers (especially during haying season). Don’t forget to check the mineral feeders or blocks to be certain that they are supplying the minerals that your cows need. In some cases, medications may be recommended by your veterinarian to be included in the mineral mix. Cow calf operators will want to monitor mineral consumption closely to be certain that the label-recommended amounts are being consumed by the cattle. A “Veterinary Feed Directive” (VFD) will be necessary for antibiotic feeding in mineral supplements. Contact and work with your local large animal veterinarian about the appropriate VFD for your operation.