Why is there a horizontal crack in my horse’s hoof wall? | arlo.® Atlas
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Overview
A horizontal crack in the hoof wall is often linked to an older change in hoof growth, pressure on the hoof, or a period where growth was briefly affected. In many cases it’s not an emergency, but it is worth checking carefully because the cause can range from minor to more significant hoof stress.
Things To Check
1. Look at where the crack sits. A crack low down near the ground line is often different from one higher up the hoof wall.
2. Check whether it only affects one hoof or several, as that can give a clue about whether it’s local or more general.
3. Feel for heat in the hoof and check for a stronger-than-usual digital pulse.
4. Watch whether the horse is sore on that foot, turning short, or reluctant to move freely.
5. Look for discharge, a bad smell, crumbly horn, or any sign the crack has opened up deeper than the outer wall.
6. Check the hoof balance and trim history if you can. Recent trimming changes, long toes, under-run heels or uneven wear may be relevant.
7. Consider whether there has been a recent bout of illness, poor condition, changes in feed, or a period of reduced growth, as these can show up later in the hoof wall.
Common Causes
The most common reason is a temporary interruption in hoof growth that leaves a visible horizontal line or crack as the hoof grows down. This can happen after stress, illness, or a period of reduced horn quality.
Another common cause is uneven loading or hoof imbalance. If one area of the hoof is taking more pressure than it should, the wall can split or show a horizontal defect as it grows.
Wet and dry changes, poor hoof quality, or repeated chipping can also weaken the hoof wall and make cracks more likely.
Less commonly, a horizontal crack may be linked to deeper hoof injury, infection, or a problem that needs a closer look from your farrier or vet.
What To Do
Keep the hoof clean and dry where possible, and check it regularly so you can see whether the crack is spreading or the hoof is becoming more sensitive.
Note whether the horse is lame, whether the crack is changing, and whether there are any signs of heat, pain or discharge.
Speak to your farrier about the crack, especially if the hoof balance may be contributing or if the crack is moving higher up the wall. A good trim and sensible foot management often matter more than trying to hide the crack.
If turnout is wet, muddy or very hard underfoot, try to reduce avoidable stress on the hoof where you can and keep the environment as sensible as possible for the horse’s feet.
If the horse is comfortable, the crack is not worsening, and the hoof looks otherwise healthy, it may be something to monitor between farrier visits.
When To Contact A Vet
Contact your vet if the horse is lame, the hoof is hot or very painful, the crack is deep or reaching sensitive tissue, or there’s discharge or a strong smell. It’s also sensible to get advice if the crack appeared after an injury or if it’s getting worse despite routine farriery care.
Products That May Help
If you’re dealing with hoof cracks alongside wet turnout, mud or general hoof hygiene concerns, this collection may be useful as part of your routine care.
Related Questions
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Atlas is here to support owners with practical, easy-to-understand guidance. It is not a substitute for professional veterinary advice. If you're concerned about your animal's health, symptoms worsen, or something doesn't feel right, contact your vet.