What should I do if my horse’s hoof crack is spreading under the shoe?
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Overview
If a hoof crack is spreading under the shoe, it’s worth taking it seriously and checking it promptly. It may be caused by movement in the hoof, a loose or poorly fitting shoe, a dry or brittle hoof, or pressure on the crack, but you can’t tell the exact cause just by looking.
Start with a careful look, keep the hoof as clean as you can, and speak to your farrier soon if the crack is extending, the shoe looks loose, or your horse seems sore.
Things To Check
1. Check whether the crack seems longer, wider, or deeper than before, especially at the shoe line.
2. Look for any signs that the shoe is loose, twisted, or sitting unevenly on the hoof.
3. Feel the hoof and lower leg for heat, and watch for any swelling or a stronger-than-usual digital pulse.
4. Notice whether your horse is short-striding, reluctant on turns, or not wanting to weight-bear normally.
5. Check for discharge, a bad smell, soft horn, or crumbly hoof wall around the crack.
6. Think about recent turnout, wet ground, hard ground, travel, work, or a change in shoeing routine.
7. Look at the rest of the hoof for chips, flare, bruising, or other cracks that might show the hoof wall is struggling overall.
Common Causes
The most common reasons are hoof wall stress, a shoe that’s allowing movement, and changes in hoof moisture that make the wall more brittle or weak.
Sometimes the crack is made worse by a previous injury, an imbalance in the trim or shoeing, or repeated concussion on hard ground.
Less commonly, a crack can be linked with an underlying hoof problem that needs professional attention, especially if there’s pain, heat, or discharge.
What To Do
Keep the hoof clean and dry, and avoid picking at the crack or trying to widen it yourself.
Limit hard exercise until your farrier has seen it, especially if the crack is moving or the horse is uncomfortable.
Make a note of whether the crack is changing from day to day, and if possible take a photo so you can compare it later.
Contact your farrier promptly, because they can assess the shoe, the trim and whether the crack needs support or a different shoeing approach.
If the hoof is very dry or very wet, improving the horse’s routine and turnout conditions may help support hoof quality over time.
When To Contact A Vet
Speak to your vet if the horse is lame, the crack is rapidly worsening, there’s significant heat or swelling, or you notice discharge, a strong smell, or signs of deeper pain. These can mean the issue is more than a simple hoof wall crack and needs assessment.
Products That May Help
Helpful hoof care and yard hygiene routines can make it easier to keep the area clean, manage wet or muddy conditions, and support day-to-day hoof care alongside farrier advice.
Related Questions
Why is my horse’s hoof crack getting worse after shoeing?
Should I keep my horse in or out with a hoof crack?
How often should a farrier check a cracked hoof?
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.