What should I check if my horse has lice in winter?
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Overview
If you think your horse has lice in winter, start by checking the coat, skin and stable routine. Lice are a common reason for itching in colder months, but similar signs can also come from dandruff, skin irritation, mud, rubbing, or a general coat issue, so it’s worth looking closely before assuming it’s lice.
Things To Check
1. Part the coat and look for small moving insects, especially around the mane, tail, ears, neck, shoulders and under the belly.
2. Check whether your horse is rubbing, stamping, biting at the skin, or seems more restless than usual.
3. Look for patchy hair loss, scurf, broken hair, scabs or areas where the coat looks rough and over-groomed.
4. Feel for hot, sore or irritated skin, and notice whether your horse objects when you brush certain areas.
5. Check any field companions for similar itching or coat changes, because lice can affect more than one horse in the same group.
6. Look at grooming kit, rugs and stable surfaces for signs of poor hygiene or shared use that could be helping the problem spread.
7. Note whether the coat is long and thick, as lice are often easier to miss in winter coats and harder to spot without a careful parting of the hair.
Common Causes
Lice are one of the most common causes of winter itching, especially in horses with thick coats, shared housing or close contact with other horses.
Skin irritation from mud, rubbing, rug friction or general coat condition can also look similar, particularly if the horse is uncomfortable in one specific area.
Dandruff, dry skin and other parasites are less common but can sometimes cause the same sort of scratching, so it’s best not to assume lice are the only explanation.
What To Do
Keep a simple note of where you see signs, how often your horse is itching and whether any stablemates are affected.
Continue normal grooming, but be gentle around sore or rubbed areas so you don’t make the skin more uncomfortable.
Wash or clean shared grooming equipment, rugs and tack as part of your usual yard hygiene routine, and avoid sharing items between horses until you know what’s going on.
If your horse is in a group, check the others too, as similar signs may help you work out whether this is something affecting more than one horse.
If the coat is very thick, a thorough parting of the hair in good light can make it easier to see what’s happening at the skin level.
When To Contact A Vet
Speak to your vet if the itching is severe, the skin looks sore or infected, there’s significant hair loss, or you’re not sure whether lice are the real cause. A vet can help confirm what’s going on and talk you through the most suitable management approach.
Related Questions
How can I tell if my horse has lice or just dry skin?
Can lice spread between horses in winter?
What does a horse’s coat look like when lice are present?
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.