Foal Teeth: What Every Horse Owner Should Know From Birth to Age 5

Last updated: July 26, 2026

By: Miles HenryFact Checked

When Do Foals Start Growing Teeth?

Although uncommon, some foals are born with one or more teeth already erupted. The deciduous teeth usually continue developing soon after birth, beginning with the incisors up front followed by the premolars further back, which handle grinding.

Deciduous vs. Permanent Teeth

Deciduous teeth — the “milk teeth” or “caps” — are temporary by design, meant to carry a foal through nursing and its first couple years of grazing before being pushed out by the permanent set. Permanent teeth are larger and stronger, built to last the rest of the horse’s working life, and the transition between the two runs from roughly 2.5 years old until around age 5.

That transition period is exactly when problems like retained caps tend to show up, which is why regular checks matter more during those years than almost any other stage of a horse’s life.

Common Dental Problems in Foals

Dental care matters most from birth through about age five, when the mouth is going through the most change. Left uncorrected, several conditions can genuinely affect how a young horse eats, feels, and eventually performs.

• Parrot mouth (overjet/overbite): the upper jaw is longer than the lower, causing hooks on molars and abnormal incisor growth. Severe cases may be treated with veterinary orthodontic appliances, including wires and bite plates. A 2016 study in the Equine Veterinary Journal reported that this approach can be effective when started early, though the age at treatment affects the extent of correction possible.
• Sow mouth (underbite): the opposite problem — the lower jaw protrudes past the upper, which also causes abnormal wear since the teeth aren’t meeting properly.
• Wry nose: the upper jaw and nose deviate to one side, misaligning teeth and sometimes affecting the airway.
• Retained caps: deciduous teeth that don’t shed on schedule, blocking the permanent tooth underneath from erupting properly.
• Sharp enamel points and impacted wolf teeth: these develop from a horse’s natural chewing motion and may need periodic floating. Wolf teeth are small, often vestigial teeth that can interfere with a bit and are commonly removed before training.
• Supernumerary or missing teeth: extra or absent teeth are less common, but worth knowing about during routine checks.

Dental Care for Foals

Early exams matter because they catch developmental problems while a foal’s mouth is still growing and more responsive to correction. A vet or equine dentist checks jaw and tooth alignment, the eruption pattern of both tooth sets, and looks specifically for retained caps, wolf teeth, and overbites.

• At home, watch for: difficulty chewing or dropping food, unusual mouth odor or excess drooling, resistance to bridling or bit training, and behavioral changes like head tossing that might signal discomfort
• What actually helps: regular mouth checks, and getting a foal comfortable with mouth handling early so future exams and treatments go smoother

I start gentle mouth handling early because it makes later exams, floating, and bit work much easier for the horse and the vet.

When to call the vet
Call a vet or qualified equine dentist if a foal has trouble nursing, chews awkwardly, drools excessively, has jaw swelling, or starts resisting mouth handling once training begins. Early evaluation is usually simpler than waiting until the problem affects eating or behavior.

What I’ve Seen: Real Dental Issues in Young Horses

A yearling I bought once had trouble eating and was clearly uncomfortable. The vet found retained caps blocking the permanent teeth underneath, removed them under sedation, and the improvement in eating and attitude was immediate.

I’ve also seen a 2-year-old in training resist the bit because wolf teeth were interfering directly with it. After extraction and a short healing period, he accepted the bit comfortably and went back to training well.

Both cases point to the same lesson: catching a dental problem early is almost always cheaper and easier than living with the behavior it causes.

Nutrition’s Role in Dental Development

From my experience raising young horses, diet matters for overall growth and bone health, and good nutrition supports normal dental development. Adequate calcium, phosphorus, and vitamins A, D, and E are especially important in a growing foal. A balanced, forage-based program also supports healthy chewing as the mouth develops.

Here’s a video covering common dental issues in young horses.

FAQs About Foal Teeth

Proactive dental care is what actually keeps a foal on track to grow into a horse with a healthy, functional mouth. Most problems — retained caps, wolf teeth, sharp points — are simple to catch and fix early, and genuinely harder to deal with once they’ve been allowed to affect a horse’s eating or behavior for a while. If something seems off with a young horse’s mouth, that’s worth a vet call, not a wait-and-see approach.

What the experts say: the American Association of Equine Practitioners recommends foals be examined shortly after birth and periodically through their first year specifically to catch congenital dental problems early. Their guidance also notes that yearlings often develop enamel points sharp enough to damage cheek and tongue tissue, and floating can help relieve discomfort caused by these sharp points.

Sources: American Association of Equine Practitioners; Easley et al., 2016, Equine Veterinary Journal — orthodontic correction of overjet/overbite in foals; EQUUS Magazine — equine orthodontic appliances.