A balling gun is a handheld veterinary tool used to deliver large pills, boluses, and capsules directly into the throat of livestock and other animals. It works like a long syringe without a needle: you load a solid medication into the head, place the head over the back of the animal’s tongue, and push a plunger to deposit the bolus deep enough that the animal swallows it. The name comes from “bolus,” the rounded, oversized tablets commonly given to cattle, sheep, and goats.
How a Balling Gun Works
The design is simple. A balling gun has three main parts: a long barrel (usually 16 to 18 inches), a plunger rod that runs through the barrel, and a head at the tip that holds the medication. You load the bolus into the head, restrain the animal, open its mouth, and slide the head over the base of the tongue. One push of the plunger ejects the bolus into the back of the throat, triggering the swallow reflex. The whole process takes seconds once you and the animal are in position.
The heads come in either steel or plastic. Steel heads are reinforced for extra strength and resist breakage during repeated use across large herds. Plastic heads are lighter and sometimes preferred for smaller animals or situations where a softer contact point matters. A typical steel-headed model measures about 16 inches long with a 1-inch diameter head, while a plastic-headed version runs slightly longer at about 16¾ inches with a 7/8-inch diameter head. Metal construction throughout the barrel resists corrosion, which is important for a tool that gets wet and needs frequent cleaning.
What It’s Used to Deliver
Balling guns deliver solid oral medications that are too large for an animal to eat voluntarily or that need to reach the throat intact. The most common payloads include mineral supplement boluses (copper and cobalt are especially popular for goats and cattle), deworming tablets, antibiotic boluses, and vitamin capsules. Some farmers also use balling guns to administer rumen magnets, which are smooth metal pieces that sit in a cow’s stomach and attract stray bits of wire or metal the animal may have swallowed while grazing.
A practical tip many experienced users share: placing a small amount of probiotic paste or similar sticky substance inside the chamber helps hold the bolus in place so it doesn’t fall out before you get the gun positioned in the animal’s mouth.
Sizes for Different Animals
Balling guns aren’t one-size-fits-all. The diameter and length of the head need to match the animal’s throat. Full-sized models designed for adult cattle are far too large for goats or sheep, and using the wrong size risks injury or simply failing to deliver the medication.
- Adult cattle: Standard full-size balling guns with wider heads, typically around 1 inch in diameter.
- Calves, goats, and sheep: Smaller guns with narrower heads and sometimes spring clips to hold smaller boluses in place. These run about 18 inches long but with a slimmer profile.
- Small animals (dogs, cats, goat kids, piglets): Miniature plastic balling guns designed to deliver a single tablet, capsule, or small bolus. These look more like a large syringe than a traditional balling gun.
For goats receiving copper boluses, sizing can be tricky. A 2-gram bolus for kids and a 4-gram bolus for adults require different gun sizes, and some owners find that certain small guns don’t grip the bolus tightly enough. Testing the fit before you’re standing over a restrained animal saves frustration.
Risks of Improper Use
The most serious complication is pharyngeal trauma, meaning injury to the soft tissue at the back of the throat. This happens when the gun is pushed too forcefully, angled incorrectly, or used on an animal that jerks its head during administration. A puncture or tear in the throat lining can lead to infection, difficulty swallowing, or in severe cases, damage to the esophagus.
Boluses are increasingly given by farm owners and staff rather than veterinarians, which makes proper technique especially important. The key is firm but gentle restraint of the animal’s head, careful insertion along the roof of the mouth to avoid the teeth, and smooth plunger action once the head is positioned over the base of the tongue. Forcing the gun or rushing the process is where injuries happen.
Cleaning and Disinfection
Balling guns rank among the highest-priority pieces of farm equipment for sanitation because they make direct contact with mucous membranes and saliva. Disinfecting between animals is recommended to prevent spreading bacteria or disease from one animal to the next, particularly in a herd setting where you might treat dozens of animals in a single session.
At minimum, clean the gun with soap and hot water at the end of each day and store it in a dry area. For herds where disease transmission is a concern, keep a container of disinfectant solution nearby and dip the head between animals. Replace the disinfectant solution when it becomes cloudy or visibly contaminated, since dirty solution loses its effectiveness quickly. Letting a balling gun sit wet in a bucket or tossing it into a toolbox without drying invites corrosion and bacterial growth.