Can You Get Lice from Dogs? Understanding the Risks of Lice Transmission

This pet health content about Can you get lice from dogs was written by a veterinarian, Dr. Debora Lichtenberg, VMD. This article was originally published in 2012 and is regularly updated. It was last reviewed for accuracy and updated on October 8, 2024

If you have questions or concerns, call your vet, who is best equipped to ensure the health and well-being of your pet. This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. See additional information.

Can You Get Lice from Dogs?

I did a quick online search about dog lice, and many people are concerned about whether their pets are transmitting diseases like lice to their families, especially kids.

It’s important to understand that there are serious zoonotic diseases — diseases that can be transmitted from animals or insects to humans — but lice is not one of them. Here are a few key points to remember:

• Dog lice vs human lice: Dog lice cannot survive on human hosts.
• Transmission myths: Your dog did not transmit lice to your kids.
• Lice prevention: Focus on human-to-human contact when addressing head lice concerns.

Since head lice became a resurgent problem in children over the last 40 years, people have developed misconceptions about a supposed link between pets and kids. But the truth is, your dog or cat did not give lice to your children. Dog lice do not live on humans.

Lice Are Species Specific

The good news is that lice are species-specific and can’t be transmitted from one species to another. Dog lice stay on dogs, cat lice on cats, and human lice on humans. Here are a few key points to keep in mind:

• A dog louse can get on a human, but it cannot survive or live on us — it dies.
• If you or your child have a persistent lice infestation, it’s a human lice problem, not a dog lice problem.
• The reverse is also true: Your dog cannot get lice from your child. Human lice won’t survive on dogs.

For more information about species-specific lice transmission, you can check this resource.

What Are Lice?

Lice are flat, six-legged, wingless insects that can be seen with the naked eye. They spend their entire life cycle on your pet, laying eggs called nits — the small white things you might notice on hair shafts.

Here’s a quick comparison between dog lice and human lice:

• Dog lice stay on dogs, while human lice stay on humans.
• Nits, or lice eggs, are easier to spot on your child’s head than on your dog.

Though lice are gross, upsetting, and generally unpleasant, they can be treated effectively on any living creature — whether it’s a human or a dog.

Types of Dog Lice

Dogs typically get two main forms of lice:

• Trichodectes canis is a chewing louse that can be found worldwide. It is also a vector for the canine tapeworm. If you notice rice-shaped segments around your dog’s anus, it could indicate a tapeworm infection, which is often caused by a flea problem.
• Linognathus setosus is a sucking louse that draws blood from your dog’s skin, potentially causing more damage than chewing lice. This parasite can lead to anemia, especially in puppies, and is more common in longhaired breeds. It thrives in colder climates and can also be found worldwide.

How Did My Dog Get Lice?

Your dog can get lice only from direct contact with another dog that has lice or from nit-contaminated bedding, grooming equipment, or similar sources. Lice do not live long in clean environments, so maintaining hygiene helps prevent infestations.

Here are some key factors that may lead to lice infestations:

• Direct contact: Lice are typically spread through close contact with an infected dog.
• Contaminated items: Grooming tools, bedding, or dog clothing contaminated with nits can also transmit lice.
• Environmental factors: Lice are adapting to drier, cooler climates due to climate change, making lice infestations more likely in areas where they were previously uncommon.

Lice are not very common in the United States or Europe. However, in tropical regions, lice infestations occur more frequently. In rural areas of Central and South America, Africa, and the Middle East, reported infestations range from 4–22%. Since data from these regions isn’t always reliable, the true incidence of lice could be much higher.

If you adopt a dog from a very warm climate or from a dense shelter with poor husbandry practices, lice are a possibility.

Symptoms of Lice on Your Dog

Like most ectoparasites (parasites that live on the skin), lice can cause itching and discomfort in your dog. As the infestation worsens, you may notice your dog’s coat becoming scruffy or bald patches appearing.

Here are some common symptoms of dog lice to watch for: Itching, scratching, or biting Dry, poor-quality coat Matted fur Hair loss (learn more about hair loss) Restlessness (due to itchiness)

• Anemia or unthrifty puppies in severe infestations

Where to Look for Lice

Lice tend to live in specific areas of your dog’s body, so observing where lesions occur can help with a diagnosis. Lice love to settle around: Ears Neck Shoulders Anus

Since many skin diseases and parasites can cause similar symptoms (like itching and scratching), paying attention to where the lesions are concentrated can help your vet narrow down the cause of the problem.

Treatment of Dog Lice

Because lice are rare, they have not developed much resistance to our common insecticides. This is a good thing.

• Bathing your dog with an insecticide (flea and tick shampoo) should eliminate adult lice. Follow this with a spray or powder.
• To eradicate all other stages of the lice, use a flea/tick product such as Revolution or Frontline every 1–2 weeks for several treatments. This should be done with help and guidance from your vet.
• Environmental control may be needed in rare cases with intense infestations. Clean all bedding or dispose of any bedding that cannot be washed.
• In longhaired dogs or dogs with severe matting, shaving the dog may help.

Diagnosis Is Important

Veterinarians often see an abundance of dermatology cases in small animals. Your dog can be susceptible to a range of skin diseases, such as fleas, mites, other ectoparasites, skin allergies, and skin infections. Here’s why getting a diagnosis is critical: Undiagnosed skin issues only worsen over time.

• Treating your dog without a vet’s diagnosis might mean using the wrong product, allowing the skin problem to fester.
• Lice are rare, so if your dog is scratching, itching, or losing hair, simply using a flea shampoo may not solve the issue.

Why Proper Treatment Matters

Have you ever dealt with itching problems yourself? Poison ivy, psoriasis, or severe reactions to insect bites? Itching can drive you crazy, and untreated skin issues can quickly escalate. Dogs are no different — when a dog comes in after weeks or months of itching, with hair loss and lesions, it's heartbreaking. These pups are suffering and need the right diagnosis and treatment.

Protecting Both Pets and People

Veterinarians undergo extensive training on zoonotic diseases to protect both your pets and your family. If you're worried about your dog transmitting something to your children, your vet can answer any questions and help ensure your pet and family stay safe.

Frequently Asked Questions (FAQ)

References

• Lundgren, Becky, DVM. "Lice in Dogs and Cats." Veterinary Information Network. https://www.veterinarypartner.com/Content.plx?P=A&C=15&A=2794&S=0&EVetID=900000117.
• Rothrock, Kathy. "Pediculosis." Veterinary Information Network. June 8, 2017.
• Castillo Oriard, Guilie. It's About the Dog: The A-Z Guide for Wannabe Dog Rescuers. Lulu. 2018. 67. https://books.google.com/books?id=55tUDwAAQBAJ&pg=PA67#v=onepage&q&f=false.
• Thomas, Jennifer E., DVM. "Lice of Dogs." Merck Veterinary Manual. https://www.merckvetmanual.com/dog-owners/skin-disorders-of-dogs/lice-of-dogs.
• "Lice." April 1, 2013. CAPC Vet. https://capcvet.org/guidelines/lice/.
• Arther, Robert G., PhD. "Mites and Lice: Biology and Control." Veterinary Clinics of North America: Small Animal Practice 39, no. 6 (November 2009): 1159–1171. https://pubmed.ncbi.nlm.nih.gov/19932368/.