What Can a Horse’s Teeth Tell You?

Last updated: August 14, 2026

By: Miles HenryFact Checked

I have looked into plenty of horse mouths over the years, including horses I was considering buying, and I learned one lesson early: teeth can tell you a lot, but they cannot tell you everything.

Horse teeth can help you estimate age, spot possible dental trouble, and sometimes reveal a habit such as cribbing. But an adult horse’s teeth are not a birth certificate. A quick look at the incisors can be useful, but it cannot replace reliable records or a proper dental examination by your veterinarian.

Here is what I look for when I check a horse’s teeth, what those clues can mean, and where I stop guessing and call the veterinarian.

What Can You Tell From a Horse’s Teeth?

If I’m buying a horse, I use the mouth as one piece of the puzzle. I want the teeth to make sense with the horse’s stated age, condition, records, and history. If something doesn’t add up, I don’t try to solve the mystery by staring harder at the incisors – I check the available records and arrange a professional examination. Here is what a horse’s teeth can tell you.

• Approximate age: Teeth are most helpful for aging young horses and less exact in mature or older horses.
• Possible dental trouble: Quidding, dropped feed, foul breath, facial swelling, nasal discharge, and weight loss are all reasons to schedule a dental examination.
• Uneven wear: Hooks, ramps, wave mouth, step mouth, and shear mouth can interfere with normal chewing.
• Cribbing clues: Worn or chipped front teeth may lead you to ask questions about a horse’s habits and management.

How Many Teeth Does a Horse Have?

Most adult horses have 36 to 40 teeth, although some have additional canine and wolf teeth, bringing the total to 44. Stallions and geldings are more likely to have prominent canine teeth, while mares may have small canines or none at all. Wolf teeth can occur in horses of either sex.

The 12 incisors – six upper and six lower – cut grass and forage. Behind them is the interdental space, commonly called the bars, where a bit rests. Farther back are the cheek teeth – premolars and molars – which do most of the grinding of hay, grass, and other forage.

Young horses have 24 deciduous, or milk, teeth before the permanent teeth come in. If you are curious about the earliest stage of equine dentition, read my article on whether baby horses are born with teeth.

Can You Tell a Horse’s Age by Its Teeth?

Yes, but you should treat it as an estimate – not proof. Dental aging is most dependable in young horses because permanent incisors arrive in a fairly predictable sequence. As a horse gets older, diet, grazing conditions, cribbing, dental care, genetics, and ordinary individual wear all make the estimate less precise.

The useful clues include which permanent incisors have erupted, whether cups remain on the grinding surfaces, the appearance of dental stars, and the shape and angle of the incisors. Galvayne’s groove on the upper corner incisor can be a supporting clue in an older horse, but I would never use it alone to put an exact age on one.

Common dental landmarks used when estimating a horse’s age

Approximate age	What you may see	My practical read on it
Birth to 8 months	The 12 deciduous incisors normally erupt during the first several months of life.	Useful for confirming that a foal or weanling’s stated age makes sense.
2½ to 4½ years	Permanent central, intermediate, and then corner incisors replace the milk teeth.	This is where teeth can give you a reasonably useful age estimate. I would not pretend the mouth can tell me whether the horse is exactly three years and eight months old.
About 5 years	Most horses have a full mouth of permanent incisors.	The horse is dentally mature, but age estimates become less exact from here forward.
6 to 11 years	Cups wear away from the lower incisors first, and dental stars become more noticeable.	Useful only when you consider several clues together, not one marker by itself.
Over 10 years	Galvayne’s groove may appear on the upper corner incisor, and incisors gradually become longer and more angled.	Helpful supporting evidence, but individual variation is wide. This is where records become much more valuable than a mouth estimate.
Senior horses	Incisors may be longer, narrower, more angled, and more triangular in cross-section.	These changes suggest age, but they do not produce a precise number.

Research on dental aging has found that incisor eruption is one of the more consistent age clues, while dental stars can also be useful. Traditional markers such as Galvayne’s groove and the seven-year notch are much less dependable than the old horse-aging charts sometimes suggest. Read the published research on the accuracy of aging horses by their teeth.

When I’m looking at a horse for purchase, this is where I become especially cautious. A mouth can give me an estimate, but I don’t want to make a buying decision based on an estimated age when better documentation is available.

You may have heard the old term bishoping, which refers to altering a horse’s incisors to make an older horse appear younger. It is another reason not to rely on a mouth exam alone when confirming age in a sale.

Horse Dental Problems: What Should an Owner Watch For?

Horses can be surprisingly good at working around dental discomfort, which is one reason problems can go unnoticed. The first clue may be a feeding change, a gradual loss of condition, or a horse that suddenly does not want to accept the bit. None of these signs automatically means bad teeth, but each is a good reason to schedule an examination.

• Quidding: Wet wads of partly chewed hay or feed dropped from the mouth.
• Dropped feed or slow chewing: A new problem keeping grain or hay in the mouth can signal discomfort.
• Weight loss or poor condition: The horse may have feed available but struggle to chew it efficiently.
• Bad breath, nasal discharge, or facial swelling: These signs can be associated with dental infection, periodontal disease, or sinus involvement.
• Resistance to the bit: Head tossing, opening the mouth, chewing the bit, reluctance to bridle, or a sudden change in way of going can justify a dental check.
• Long fibers or whole grain in manure: This can be another clue that a horse is not chewing normally.

Quidding, foul breath, weight loss, feed dropping, and facial swelling are recognized warning signs of equine dental trouble. University of Minnesota Extension recommends yearly dental exams and identifies quidding, foul-smelling breath, nasal discharge, and swelling as signs that should not be ignored.

What Abnormal Tooth Wear Means

You do not need to diagnose a mouth from across the stall, but it helps to understand the terms a veterinarian may use. Most bite abnormalities affect how a horse grinds feed and need a proper oral examination, often with a full-mouth speculum and sedation.

Hooks and ramps

A hook is an overgrowth at the front or back of the cheek-tooth arcade. A ramp is a similar overgrowth, usually described on the lower cheek teeth. Both can limit normal jaw movement and create painful points or uneven chewing surfaces. A pronounced overbite, often called parrot mouth, can make hooks more likely.

Wave mouth, step mouth, and shear mouth

Wave mouth describes a wavelike chewing surface caused by uneven wear. Step mouth often develops when an opposing tooth overerupts into a space created by a missing or shortened tooth. Shear mouth describes cheek teeth with a steeply sloped grinding surface, often from uneven side-to-side chewing.

These are not do-it-yourself trimming projects. Correction can require staged dental work because taking too much tooth off at once can create a new set of problems. Severe cases may need long-term management.

Wolf teeth

Wolf teeth are small, variable teeth usually found just in front of the upper cheek teeth. Some horses never develop them; some have one or more; and lower wolf teeth can occur as well. They are nonfunctional teeth, and whether they matter depends on their position, size, and whether the bit contacts the area.

I recently had the equine dentist out to look at my colt because he had started shaking his head during training, and it was clear that something in his mouth was bothering him. After examining him, we decided to remove his wolf teeth. In his case, the goal was to eliminate a potential source of discomfort and give the bit as much comfortable room as possible in his mouth.

I wouldn’t take that to mean every horse with wolf teeth needs them removed. The position and size of the teeth matter, as does the horse’s job and the way the bit sits. For me, the important lesson was that the head shaking was a change in the horse’s behavior that warranted looking into rather than simply trying to ride through it.

Can Horse Teeth Reveal Cribbing?

They can leave a strong clue. A horse that repeatedly cribs on a fence, stall door, or feed tub may wear or chip the front incisors. The pattern is often enough to make me ask more questions when I’m looking at a horse to buy, but I would never use worn incisors alone to declare that a horse cribs.

Worn incisors are a clue, not a complete history. Ask the seller directly, look at fences and stall surfaces, and observe the horse during a calm period around feed time. If cribbing matters to your management plan, read my guide on whether to avoid buying a horse that cribs.

How Often Should a Horse Have a Dental Exam?

Young horses, mature horses, and seniors do not all have the same dental needs. For a mature horse, I use an annual dental exam as a baseline. Young horses and horses with known dental problems may need to be checked more often. AAEP owner guidance recommends at least annual exams for mature horses and says horses 2 to 5 years old should be examined twice a year.

I don’t think of floating as “filing teeth because it is that time of year.” The horse needs an examination first. Floating is the controlled adjustment of sharp points or overgrowths that interfere with comfort and chewing, and some horses need more attention than others.

For a detailed look at timing and purpose, read how often horses need their teeth floated and why.

FAQs About Horse Teeth

Bottom Line

Horse teeth can give you useful information, especially when you are estimating a young horse’s age, evaluating a potential purchase, or trying to understand a change in eating or riding behavior. But teeth are evidence, not proof. Know what looks normal, pay attention when something changes, and get your veterinarian involved before a mouth problem turns into lost condition, poor performance, or a more difficult repair.

Disclaimer: This article is based on hands-on horse-management experience and veterinary and university-extension references. It is general information, not a diagnosis or treatment plan. Have your veterinarian examine your horse if you notice a feeding change, weight loss, facial swelling, foul odor, nasal discharge, suspected choke, or a sudden change in behavior under saddle.