Therefore, depending on management and the tendencies of each individual, gelding usually takes place between six and twenty-four months of age. Early spring and late fall are the traditional seasons for gelding. Flies are usually not a serious problem for the healing wound site and the lower seasonal temperatures do not exaggerate swelling of the sheath. However, the mud characteristic of spring and fall may make dry, sanitary conditions more difficult to provide and maintain. All horses should be current in their deworming and vaccination schedules.
Parasites can steal nutrients necessary for proper healing.
Yearlings should have a booster at least a month before gelding. The veterinarian should be informed of the horse's immunization status. If the horse is not current for tetanus, the veterinarian will likely administer tetanus antitoxin at the time of surgery. The horse should have good manners for pre-tranquilizer handling. Veterinarians should not be subjected to potential injury from an unruly yearling stallion.