New Food and Drug Administration rules mandate that feed and water antibiotic used for livestock after Jan. 1, 2017 will require veterinarian oversight.
In short, this means that picking up 50-pound bags of feed antibiotic additive, or half-pound packages of water soluble antibiotic additives will not be a spur of the moment action anymore, but rather will require a Veterinary Feed Directive, or a prescription.
All food-producing animals fall under these guidelines.