What should I check if my horse has white line disease?
Share This Guide
Read time: 3 minutes
Overview
If you think your horse may have white line disease, the main things to check are the hoof wall, the white line itself, and whether there’s any softening, crumbling, gaps or debris around the sole. It’s often linked to hoof capsule damage, leverage, moisture changes or separation in the hoof wall, but you can’t confirm the cause just by looking.
The aim is to spot changes early, keep the hoof as clean and dry as you can, and note anything that seems to be getting worse.
Things To Check
1. Look for any widening, dark staining or separation along the white line when the hoof is clean and dry.
2. Check the hoof wall for small cracks, chips, flares or areas that seem loose or crumbly.
3. Notice whether there’s a smell, powdery material, or trapped dirt and debris around the sole or hoof wall.
4. Compare all four feet and see whether one hoof looks more affected than the others.
5. Check if the horse is short-striding, reluctant to turn, or more sensitive on hard ground.
6. Think about recent changes such as very wet turnout, dry ground, new footing, missed trims or increased work.
7. Feel for heat and watch for any swelling higher up the limb, which may suggest the problem isn’t limited to the hoof.
Common Causes
The most common reason for white line disease is separation within the hoof wall, often made worse by imbalance, excess movement, or changes in hoof quality.
It may also be linked to wet and dry cycles, poor hoof hygiene, trapped dirt, long toes, flares, or feet that aren’t being trimmed regularly enough.
Less commonly, underlying lameness, bruising or other hoof problems can contribute to changes that look like white line disease from the outside.
What To Do
Keep the hoof clean and dry enough for you to inspect it properly, and avoid picking at damaged areas yourself. Make a note of which hoof is affected, what it looks like, and whether the issue changes after turnout or exercise.
Keep up with regular farrier care, as balancing the foot and managing any separation are often part of ongoing hoof management. If the horse is standing in very wet or very dry conditions, try to reduce sudden changes where possible.
If the area is spreading, the horse seems sore, or you’re unsure how deep the separation goes, ask your farrier or vet to assess it.
Related Questions
Can white line disease be hidden under the hoof?
How do I keep my horse’s feet clean in wet weather?
When should I call my farrier about hoof separation?
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.