Why is my horse developing new bald spots after contact with another horse? | arlo.® Atlas
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Overview
If your horse has developed new bald spots after contact with another horse, ringworm is one possible cause, especially if the patches are circular, scurfy or spreading. It could also be rubbing, minor skin irritation, lice or another skin issue, so it’s worth checking the pattern and any other changes rather than assuming it’s just one thing.
Things To Check
1. Check whether the bald spots started after turnout, grooming, sharing tack, or being stabled near the other horse.
2. Look closely for round patches, flaky skin, crusts, broken hairs, redness or any moist areas.
3. Check whether your horse seems itchy, is rubbing on fences or stable doors, or is sensitive when touched.
4. Look at the other horse as well, if you can, for similar bald patches or scurfy skin.
5. Check whether rugs, saddle areas, headcollars or grooming tools might be rubbing in the same place each time.
6. Note whether the patches are spreading, multiplying, or staying in one place.
7. Check your horse’s general condition for signs that the skin issue is part of a wider problem, such as dull coat or discomfort.
Common Causes
Ringworm is one of the most common reasons for new bald patches after contact with another horse. It often causes circular areas of hair loss with scaly skin, and it can spread through direct contact or shared equipment.
Rubbing from rugs, tack, headcollars or grooming can also leave bald patches, especially if the skin underneath looks otherwise normal.
Lice, mites or other skin irritation can cause patchy hair loss too, often with itching or scurf. Less commonly, a small injury or pressure area may be the reason.
What To Do
Keep an eye on the patches over the next few days and take photos so you can see if they are changing. Try to avoid sharing grooming kit, rugs or tack until you know what’s going on, and clean equipment and surfaces regularly.
Handle the area gently and avoid picking at scabs or scurfy skin. If the patches are near the saddle, headcollar or rug lines, check the fit and look for signs of rubbing.
If you suspect ringworm, it's sensible to limit close contact with other horses and keep hygiene tight around the stable or yard while you monitor the skin.
When To Contact A Vet
Contact your vet if the bald spots are spreading quickly, the skin is very sore or inflamed, there’s discharge, your horse seems unwell, or several horses on the yard develop similar patches. A vet can help confirm whether ringworm or another skin problem is more likely and advise on the right management.
Products That May Help
If the skin looks irritated or you want to keep grooming and washing routines gentle while you monitor the patches, this collection may be useful as part of your day-to-day care.
Related Questions
Can ringworm spread between horses?
How do I know if a bald patch is from rubbing or a skin infection?
Should I clean shared grooming kit if ringworm is suspected?
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.