11 min read Last updated: January 2026 Youngster suddenly headtossing, salivating or snatching at the reins? Learn how to keep your horse comfortable and your schooling on track as erupting canines at 45 years make the bars sorewhat to adjust in your bit and training, how to spot trouble early, and when to call your EDT or vet. Quick Summary Short on time? Here are the key takeaways. Area: Canine Eruption Timing What To Do: Expect canines to erupt between 46 years; log dates and adjust work accordingly. Why It Matters: Planning around this window prevents training against dental pain. Common Mistake: Assuming resistance is disobedience rather than teething sensitivity. Area: Behaviour & Bitting What To Do: Watch for head tossing, excess saliva or bitgrabbing; lighten contact and check bit width and thickness. Why It Matters: Sensitive bars and erupting canines make normal pressure painful. Common Mistake: Tightening the noseband or increasing rein pressure to fix it. Area: 6Monthly Dental Checks What To Do: Book under6s every 6 months, ideally prespring and postwinter, with a qualified EDT or RCVS vet. Why It Matters: Regular checks catch sharp points, caps, wolf teeth and tartar early. Common Mistake: Leaving young mouths a full year or using unqualified providers. Area: Weekly Mouth Check What To Do: Inspect lips, gums, bars and canines weekly; feel the interdental space gently from the side; rinse after sugary treats. Why It Matters: Early spotting of rubs, ulcers and swelling prevents bigger problems. Common Mistake: Forcing fingers in from the front or skipping checks when busy. Area: Clean Canines Routine What To Do: After a professional clean, brush canines weekly with a soft toothbrush and horsesafe gel. Why It Matters: Reduces tartar and gingivitis that increase bit discomfort. Common Mistake: Scraping tartar with hard tools or using human toothpaste. Area: Bit/Bitless Trials What To Do: Compare schooling in a smooth, correctly sized snaffle versus a hackamore/bitless in a safe arena; note behaviour differences. Why It Matters: A controlled trial separates pain from training or rider errors. Common Mistake: Changing multiple variables at once or trialling first outside an arena. Area: Training Adjustments What To Do: Keep sessions short, use groundwork/longreining, build transitions from the seat, and reward relaxation. Why It Matters: Lower mouth pressure lets teeth settle while contact confidence grows. Common Mistake: Drilling for an outline or seesawing to create a frame. Area: Professional Intervention What To Do: Call your EDT or vet if signs persist >1 week, feed is dropped, gums redden, or a bit/teeth clash is suspected; request conservative floating. Why It Matters: Timely, balanced dentistry prevents chronic mouth issues. Common Mistake: Aggressively floating erupting teeth or ignoring persistent pain signs. In This Guide When do canine teeth erupt in horses? Why erupting canines change bitting and behaviour UK seasonal timing and dental checks Weekly mouth check: what to look for Bitting during teething: practical options Training management for 46-year-olds When to call the EDT or vet A simple weekly care plan and kit Your rising 4-, 5- or 6-year-old suddenly tossing his head, salivating or snatching at the reins? It may not be naughtiness his canine teeth could be erupting and the bars of his mouth are sore.Key takeaway: In most male horses, the canine teeth erupt at 45 years (sometimes as late as 6), and this teething phase can make bitting uncomfortable plan 6monthly dental checks, adjust your bitting and training, and keep the canines clean to prevent problems.When do canine teeth erupt in horses?Canine teeth in horses usually erupt at 45 years of age in males, with full emergence occasionally delayed to 6; females often lack them or have very small, shortrooted canines. As Horse & Hound explains, these teeth sit in the interdental space the gap between the incisors and the cheek teeth exactly where the bit lies.Delayed eruption is not unusual; some youngsters dont finish cutting their canines until 6. During this period, the gums can be tender and the surrounding bars of the mouth particularly reactive to pressure. In fillies, true canines are rare or appear as tiny pegs, but even small teeth can collect tartar and benefit from routine cleaning and checks.Canine teeth are usually absent or less developed in female horses, but erupt in most male horses by the time they are between four-and-a-half and five years old. They are situated in the interdental space (between the incisors and cheek teeth). Horse & HoundWhy erupting canines change bitting and behaviourBetween 46 years, erupting canines and changing bars can make the mouth highly sensitive, so many youngsters resist the bit with head tossing, excess salivation or bitgrabbing. Behavioural signs commonly reported during this teething window include sudden tension in the contact, opening the mouth, chewing the bit without settling, or refusing forwards into an outline.Theres good reason: the bit sits in the same interdental space as the erupting canines, and pressure can clash with unerupted wolf teeth or changing cheek teeth. The World Bitless Association, discussing veterinary-informed research and young Thoroughbred colts, notes the bars are especially sensitive until around 6 years:The bars of the mouth will be especially sensitive in a young Thoroughbred colt that is teething. Canine teeth do not finish erupting until the colt is 6... World Bitless AssociationIn fact, a study collated by the same source recorded a 87% improvement across 37 painbased behaviours (median 23 to 2 per horse) after 35 days bitfree, underscoring how mouth pressure can exacerbate sensitivity during this age. You dont have to abandon bitted riding forever, but its a clear sign to evaluate fit, material, and training load when a youngster is teething.Watch for softtissue trauma too. If the bit pushes flesh into erupting teeth or sharp edges, you may find rubs, bruising or ulcers under the tongue. Weekly checks will often reveal a small problem before it becomes a big one (more on that below).UK seasonal timing and dental checksIn the UK, book dental checks every 6 months for horses under 6 years, timed before the spring workup and after winter stabling when chewing patterns change. This schedule helps your equine dental technician (EDT) or RCVS-registered vet monitor eruption, remove small issues early, and prevent uneven wear as the permanent teeth come through.Winter matters: many UK yards increase stabling on wet, muddy days. With more haylage and less abrasive grazing, cheek teeth may develop sharper points more quickly, and mouths can be less tolerant of a bit after a few weeks of soft forage. As Cinder Hill Equine Vets note, diet and environment influence dental wear; factor this into your check schedule and training plans.Spring also exposes issues. As you ramp up schooling (MarchMay), 45yearolds often first show canine eruption discomfort. Booking a preseason mouth assessment ensures youre not training against a dental problem. For UK owners, working with a qualified EDT (registered under UK guidelines) or your RCVS vet is the gold standard; both align with best practice advocated across UK bodies such as BEVA.Weekly mouth check: what to look forCheck your horses mouth weekly for rubs, ulcers, bruising, flesh pushed into teeth by the bit, tartar on canines, and any sharp edges you can safely feel. You dont need professional tools; calm handling, good light and a simple routine make the difference.Heres a quick, safe sequence inspired by riderlevel guidance from Online For Equine and other UK practitioners:Wash your hands, stand to one side, and gently lift the lips to inspect the incisors and gums. Look for redness, swelling, or feed trapped around any erupting tooth.Slide one finger (from the side, not the front) into the interdental space to feel for heat, swelling, or sharp edges never force.Lift the tongue to glance underneath; check for ulcers or rubs from the bit or sharp teeth.Visually locate the canines (if present). If theyve erupted, look for yellow/brown tartar at the gumline.Rinse the mouth after work if youve used a sugary treat or gel; residue can harden as tartar on canines.Pro tip: After a professional clean, brush the canines weekly with a soft toothbrush and a horsesafe gel to deter tartar. As Horse & Hound advises, tartar left in place predisposes to gingivitis and should be removed by your EDT or vet during routine checks.For your athome kit, a soft brush and gentle gel will cost around 515. You can keep them with your daytoday care items our grooming essentials make it easy to organise your yard routine. Use small, highvalue rewards so your horse enjoys the process; our horse treats are handy for positive reinforcement during mouth handling.Bitting during teething: practical optionsUse a correctly sized, smooth snaffle or temporarily go bitless (hackamore) to remove pressure while canines erupt and to differentiate pain from training issues. Start by testing in a controlled environment: the NS Bits guide recommends riding in a hackamore or bitless bridle in a school to compare behaviour and outline with and without bit pressure.Practical steps that work for many 46yearolds:Check width and thickness. Too narrow pinches; too wide rocks. Many youngsters also prefer a thinner, smooth mouthpiece during teething to reduce bulk on the bars.Try stable materials. Smooth single metals or saloxtype alloys can be more acceptable than rubbery textures that increase bulk when the mouth is tender.Bitless trials. School in a hackamore a few sessions and note changes: reduced head tossing, steadier outline, calmer chewing. If behaviour improves bitless, address dentistry and bit fit before resuming bitted work.Manage bitgrabbing. Conflicts with unerupted wolf teeth or sharp cheek teeth can encourage a horse to hold the bit between teeth. Have your EDT or vet check for dental clashes and fit issues.Quick tip: If a youngster occasionally gets the bit stuck between incisors and canines when bridling or fidgeting, gently press a finger on the gum beside the bit to release it. Some riders also find temporarily using a slightly heavier (steady) bit helps the horse carry it more quietly a practical handling tip shared by UK riders on the Horse & Hound forum. If its recurrent, revisit fit and training steps rather than relying on a heavier mouthpiece long term.Safety first whenever you experiment: always wear a properly fitted riding helmet, and if you venture out, add hivis rider gear to maximise visibility while you focus on a softer contact. Quality bits typically cost 40100; at Just Horse Riders, our team can help you measure and select a mouthpiece that suits a sensitive youngster.Training management for 46yearoldsKeep sessions short, prioritise relaxation, and use groundwork while permanent teeth settle between 46 years. Youre not giving training a holiday; youre shaping a confident, elastic contact while the mouth is changing.Smart adjustments during the teething window:Short, frequent schools. Ten to twenty minutes of quality work beats drilling when the mouth is tender.Groundwork and longreining. Develop steering and rhythm without bit pressure; use protective horse boots and bandages for lunging or polework.Transitions from the seat. Reward selfcarriage moments; avoid seesawing or holding the outline.Turnout and movement. Natural chewing and steady activity help even dental wear; in wet, chilly spells, the right winter turnout rug keeps them happy to move outdoors.Avoid overfloating. Ask your professional to be conservative on incisors and erupting cheek teeth between 26 years; aggressive work can create uneven pressure on new permanent teeth, as cautioned by The Horse.At Just Horse Riders, we recommend keeping a simple training log during this phase. Note any days with extra salivation, fussing in the contact or changes after dental visits. Patterns help you and your EDT make targeted adjustments.When to call the EDT or vetCall a qualified EDT or your RCVS-registered vet if pain signs persist for more than a week of light adjustments, you spot tartar or gum redness on canines, or you suspect a tooth/bit clash. Under UK guidance, routine dentistry 12 times yearly is standard, but under6s benefit from 6monthly checks to track eruption and address caps, wolf teeth or sharp points early.Two key professional jobs during the canine years:Tartar removal and gingivitis prevention. If left, tartar will lead to gum disease (gingivitis), so a qualified EDT or vet should remove any such buildup during routine checks, advises Horse & Hound.Balanced floating. Your clinician should smooth sharp enamel points but avoid excessive reduction of erupting or recently erupted teeth, a precaution highlighted by The Horse.If youre unsure who to book, look for UKregistered EDTs and practices aligned with bodies such as BEVA and the RCVS. Always keep a record of findings so you, your trainer and clinician can connect the dots between dental changes and training responses.A simple weekly care plan and kitA 10minute weekly routine keeps erupting canines clean and comfortable, reducing the risk of bit resentment. Build this into your grooming time so it never gets skipped.Handle the lips and interdental space calmly; reward cooperation with a small treat from our treats range.Inspect gums, bars, and canines for heat, swelling, rubs or tartar. Note any changes in a diary.After your clinicians clean, brush canines weekly with a soft brush and gel (budget 515) keep them with your regular grooming kit.Evaluate bit fit and comfort monthly; if in doubt, have a trainer or bitting specialist observe.School in a hackamore once in a while to benchmark behaviour without bit pressure; compare outlines, willingness to go forwards, and jaw relaxation.Book 6monthly dental checks for under6s, and sooner if you see head tossing, excess salivation, feed dropping, or resistance that doesnt ease with lighter work.Quick tip: Before the spring workload increases, put a dental visit on the yard calendar for all 46yearolds. Youll avoid mystery contact issues just as competitions and clinics ramp up.With these steps, most horses glide through the canine eruption years, and you build a contact the horse trusts for life.Conclusion: Erupting canines are a normal milestone, not a training failure. Prioritise comfort with regular checks, a gentle brushing routine, thoughtful bitting and smart schooling adjustments. If behaviour improves bitless or worsens with more contact, involve your EDT or vet youll save time, money and your youngsters confidence.FAQsAt what age do canine teeth erupt in young horses?Most males erupt canines at 45 years, with some not fully emerging until 6; females often lack them or have very small, shortrooted versions. See Horse & Hounds guide for placement and timing.Can erupting canines cause my young horse to resist the bit?Yes. Between 46 years, the bars and interdental space are sensitive, and horses can show head tossing, extra salivation, or bitgrabbing. This is supported by the World Bitless Association and behavioural observations collated by The Epic Animal.How often should young horses have dental checks in the UK?Every 6 months for horses under 6 years, ideally with appointments before the spring workup and after winter stabling. Use qualified UK EDTs or RCVS vets; routine dentistry is typically 12 times yearly in adults. Sources: NW Horse Source; Horse & Hound.Is bit resistance always due to erupting teeth?No. Poor bit fit (too narrow or wide), sharp cheek teeth, or displaced/wolf teeth can mimic teething discomfort. Test in a hackamore in a school, as suggested by NS Bits; if behaviour improves bitless, review dentistry and bit fit.What signs of dental discomfort should I watch for in a 46yearold?Increased salivation, head tossing, fussing in the contact, dropping feed, or outright food refusal. Check weekly for rubs, bruising, ulcers (especially under the tongue), or flesh pushed into the teeth by the bit. See riderlevel checks from Online For Equine and behaviour notes from The Epic Animal.How can I keep erupted canines clean between professional visits?After a professional clean, brush weekly with a soft toothbrush and horsesafe gel (515). This reduces tartar, which, if left, can lead to gingivitis. Guidance via Horse & Hound. Keep the brush with your grooming kit so its never missed.Should I avoid floating during the eruption years?Dont avoid it but ask your professional to be conservative. Excessive floating of incisors or cheek teeth between 26 years can create uneven occlusal pressures on new permanent teeth. See the overview from The Horse for why balanced, minimal intervention is best in youngsters. Shop the Essentials Everything mentioned in this guide, ready to browse. Shop Grooming KitShop Horse TreatsShop Riding HelmetsShop Boots & BandagesShop Turnout Rugs