horse choke: a brown stallion with esophageal obstruction or strictures or choking on hay juts head

horse choke choking obstruction medicine swallowing veterinary veterinarian esophagus esophageal animal gullet coughs coughing airway brown stallion gagging block colt thrusting breathing breathe thrusts cough gag equine stricture strictures grass green male outside domestic sad sick summer tired background breed care closeup country disease doctor farm health illness job medic medical outdoors pet profession professional service sickness teeth tooth treatment vet visit hay eating grazing jutting juts obstruct danger emergency