What causes lice in dogs? | arlo.® Atlas
Share This Guide
Read time: 3 minutes
Overview
Lice in dogs are most often picked up through close contact with another infected animal or from shared bedding, grooming tools or other contaminated environments. They can also spread more easily if a dog’s coat is dirty, matted or generally in poor condition, but the root cause is usually contact with lice rather than anything an owner has done wrong.
There can be several possible reasons for a dog scratching, looking uncomfortable or having a dull coat, so it’s worth checking the signs carefully rather than assuming lice straight away.
Things To Check
1. Look closely through the coat, especially around the neck, shoulders, rump and base of the tail, for small moving insects or tiny pale eggs attached to hair shafts.
2. Check for scratching, nibbling, restlessness or rubbing, and note whether it seems worse after contact with other dogs or after using shared bedding.
3. Inspect the skin for redness, scabs, broken skin or areas where the coat looks thin from overgrooming.
4. Think about recent contact with kennels, dog daycare, grooming salons, rescue centres or dogs from outside the household.
5. Look at bedding, blankets and grooming equipment to see whether anything has been shared recently.
6. Check whether the coat is very matted, dirty or difficult to groom, as this can make it harder to spot what’s going on.
7. Notice whether any other pets at home are itchy or unsettled too, since parasites can sometimes affect more than one animal.
Common Causes
The most common cause is direct contact with an infected dog or, less commonly, another animal carrying lice.
Shared bedding, brushes, combs or living areas can also be involved, particularly if more than one animal uses them.
In some cases, dogs with thicker, dirtier or poorly groomed coats may be more likely to carry an infestation for longer before it’s noticed.
Sometimes the signs are actually due to another skin or coat issue such as fleas, mites, allergy or simple irritation, which can look similar at first glance.
What To Do
Separate any bedding or grooming kit that may have been shared until you’ve worked out what’s going on.
Wash bedding and soft items according to the care instructions, and clean brushes or combs well before using them again.
Keep an eye on your dog’s scratching, coat condition and skin over the next few days, and make a note of anything that changes.
If you have more than one pet, check them carefully too, because the problem may not be limited to one dog.
Try not to use random over-the-counter treatments without identifying the issue first, since different parasites and skin problems can need different approaches.
When To Contact A Vet
Contact your vet if you can see live lice, if the itching is making your dog uncomfortable, or if the skin looks sore, inflamed or infected. A vet can confirm whether lice are the problem or whether something else is causing the signs.
It’s also sensible to get advice if several pets seem affected, or if home care isn’t improving things.
Products That May Help
If you're dealing with coat, skin or grooming concerns alongside possible lice, the Pet Care collection may be useful as part of a sensible routine at home.
Related Questions
How do I know if my dog has lice or fleas?
Can dog lice spread to other pets?
How should I clean bedding if I suspect parasites?
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.