Do dog warts go away

By Isabella Storyclaire

last updated November 18, 2024

Contributions sourced from

Warts in Dogs

What Are Dog Warts?

Canine viral papillomatosis sounds serious, doesnt it? But the term is just a technical description for warts (papillomas) in dogs. While a diagnosis of dog warts is rarely serious, the condition is worth your attention, primarily so you dont confuse warts in dogs with other, nastier diseases.

Any dog can get warts, but they are more common in dogs who are immunosuppressed or spend a lot of time around other dogs. Young dogs frequently get warts in their mouths, while the skin of older dogs is more frequently affected. Certain breeds also seem to be at an increased risk of dog warts, including:

Symptoms of Dog Warts

Warts on dogs often look like a small head of cauliflower, but other, rarer types do exist, including an inverted papilloma (usually a firm lump with a dot in the middle) and dark, scaly plaques of skin that have an irregular surface.

Warts can develop in and around a dogs mouth, around the eyes, between the toes, and almost anywhere on the skin.

Some dogs develop one or just a few warts that are so small they are easy to overlook. In other cases, entire regions of a dogs body may be covered with warts of varying sizes. Warts in and around a dogs mouth may make it difficult for a dog to eat and drink normally. Warts on a dogs feet can cause lameness, particularly if the area is injured or becomes infected.

What Causes Dog Warts?

Warts in dogs are caused by infection with papillomaviruses. Many different types of canine papillomaviruses have been identified, and each type tends to cause a particular form of the disease (for example, warts in and around the mouth versus warts affecting the feet).

Dogs with warts are contagious to other dogs, but not to other animals or people. Once a dog has been infected with one type of papillomavirus, they are immune to that typebut not to others.

Papillomavirus can live in the environment for weeks, so its possible for a dog with warts to leave the virus behind in a particular area, leading to another dog contracting the virus from that location later. Papillomaviruses enter the body through a break in the skin, and infection develops when a dogs immune system cant fight off the virus before it takes hold. It generally takes four to six weeks for warts to develop after a dog is infected with papillomavirus.

How Veterinarians Diagnose Dog Warts

In most cases, a veterinarian can diagnose a dog wart with just a physical examination. If there are any questions about the diagnosis, the veterinarian can remove a sample of tissue and send it to a pathologist for identification.

Treating Dog Warts

Warts generally disappear on their own over six to eight weeks or so as the dog develops immunity against the virus. However, there are times when veterinary treatment is necessary:

Sometimes dog warts are so numerous, large, or located in places that result in secondary symptoms like lameness, difficulty eating or drinking, or eye irritation.
Warts may bleed or become infected with bacteria.
In rare cases, warts that fail to resolve on their own can turn into cancerous tumors. In general, warts that are present for more than three to five months should be treated.
Dogs who are taking immunosuppressive medications or have other, serious health conditions may be unable to get rid of warts without help.
If just a single or small number of warts is of concern, surgical removal is the treatment of choice. This can be done with a scalpel, laser, or through cryosurgery (using intense cold to destroy the wart).

Medications are often necessary when a large number of warts are causing problems for the dog. Unfortunately, its difficult to assess how effective these treatments are since most dog warts disappear on their own. However, the following treatments have been tried by veterinarians:

Interferon: an oral or injectable medication that stimulates the immune system
Imiquimod: a topical antiviral and antitumor medication
Cimetidine: an oral medication that may have a positive effect on the immune system
Azithromycin: treatment with this oral antibiotic appeared effective in one study
Immunostimulation: giving a vaccine made from a dogs own warts or Immunoregulin (a suspension of killed Propionibacterium acnes bacteria) can stimulate the immune system to respond against the virus
Reduce immunosuppression: if possible, discontinue or reduce the dose of immunosuppressive drugs and more aggressively treat any diseases that are having an adverse effect on the dogs immune system

Preventing the Spread of Dog Warts

There are a few things you can do to help protect your dog from developing warts. Obviously, do not let your dog play with or have any contact with dogs who have visible warts. If the protective nature of your dogs skin is compromised (from wounds, rashes, etc.) or their immune system is not functioning normally, do not take them to areas where other dogs congregate like parks, doggy day cares, and kennels.

And if, despite your best efforts, your dog does develop warts, keep them isolated from other pups until all the warts have disappeared.

Featured Image: iStock/Rawpixel

WRITTEN BY

Jennifer Coates, DVM

Veterinarian

Dr. Jennifer Coates is an accomplished veterinarian, writer, editor, and consultant with years of experience in the fields of veterinary...

Dog Warts: What You Need To Know About The Canine Papillomavirus

Dog warts are a fairly common issue for pet parents but can be alarming for those worried about skin cancer or similar health issues. Even worse, the internet is flooded with bad harmful advice about how to get rid of warts on our dogs.

So lets start by saying: ignore anything to do with apple cider vinegar and home remedies for dog warts in general! Dogs have sensitive skin that needs careful treatment with gentle canine-specific shampoos. Using the wrong home treatment can hurt your dog with chemical burns or disrupt the natural skin PH and microbiome, causing secondary infections.

But if youve noticed warts or growths forming on your dog, usually the mouth, nose, or paws, then you need to know what canine warts are and what to do about them safely.

So, What Are Dog Warts?

Dog warts, or canine papillomas, are benign, typically small, cauliflower-like growths caused by the papillomavirus. They mostly occur in the mouth or on the face and paws of young, immunocompromised, or older dogs. While usually harmless and often resolving on their own, some may require veterinary attention if they cause discomfort or impair normal function.

True dog warts are growths erupting from the upper layer of a dogs skin (the cutaneous epithelium). The canine papilloma virus causes warts that can erupt anywhere on a dogs body, but different strains of the virus seem to prefer different body parts, such as the eyes, mouth, nose, or paws.

According to Canine Papillomavirus a Centenary Review, these warts are essentially the same as the HPV virus that causes human warts, only its species specific to dogs.

They are most common in young dogs who dont have a fully developed immune their immune system or in older dogs whose immune system is starting to weaken. It can also be a problem for dogs who have their immune system medically suppressed, as in cancer patients.

Certain dog breeds seem more prone to the virus, including Pugs, Spaniels, Schnauzers, Shar-Peis, and certain Terriers.

What Causes Warts In Dogs?

True warts (called papillomas) in dogs are caused by the papilloma virus. There are several strains, and they tend to affect different body parts. For example, the oral papillomavirus affects young dogs most frequently and causes warts around and in their mouth.

Meanwhile, old dog warts tend to be in other parts of the skin.

The virus that causes these warts is contagious among dogs. As there are many strains, a dog can become immune to one strain if they catch it but not to others. Dont worry; humans cant catch canine papillomas; we have our own versions of this virus.

When a dog is infected, it can leave the virus behind in any area they pass through. The virus can survive for weeks so that any passing dog can pick it up, usually through a lesion in their skin. Dogs pick the wart virus through contact with bedding, food bowls, or similar items.

It can also be transmitted through insects, so read our article on keeping gnats and flies off dogs.

An adult dog with a strong immune system will typically fight off the virus and never develop any warts. But any dog whose immune system is compromised or not fully developed is vulnerable to developing growths. Although, in most cases, they will disappear on their own over a period of weeks or months.

Diagnosing dog warts

If your dog has warts, its important to visit the vet for a check-up. Warts on dogs usually look grow outward from the skin and have a cauliflower texture at the top. However, some can grow into the skin and simply make a hard round patch. These look like corn or plantar warts that humans get on their feet and can be painful or uncomfortable.

But dog papillomas can look identical or similar to several other skin tumors and growths, including:

Adenomas (common in older dogs);
Skin tags;
Mast cell tumors; and
Melanomas.

Many of these skin growths and tumors are harmless, but some are cancerous. Even normal papillomas can sometimes become cancerous, so your vet should always examine them. For this reason, dont ignore your dogs wart or try to treat them yourself in case you misdiagnose the cause.

Types of dog warts

Animal PV has several strains. To get an idea of what PV warts typically look like on dogs, weve collected some dog wart pictures.

Essentially, there are four types of papilloma virus that can affect your dog.

1. Canine mucous membrane papillomatosis

The PV virus that typically affects young dogs usually affects their mucus membranes. These are often multiple warts all over areas like the mouth, throat, lips, and even the eye.

Here is an example of an oral papilloma (wart in dog mouth) that has grown excessively large and will have to be removed for the dog to eat normally.

Warts can also infect the conjunctiva on a dogs eye (eye papilloma):

2. Skin warts

Skin warts are more common on older dogs and you may usually only see one or two. These are common in older dogs like the Kerry Blue Terrier and Cocker Spaniel. You can find them anywhere on a dogs body.

3. Skin inverted Papilloma

This kind of wart grows inward into the skin rather than outward, and you will usually see it on the belly of young dogs.

4. Wart on dogs paws

Another common place you may find warts on dogs is their paws. This is pedal papillomavirus.

Warts on a dogs paw usually occur on the back or bottom of the paw. Warts on the front paws are called palmers warts, and if they are on the back paw, they are called plantar warts.

In some dogs, like Greyhounds, a corn can form in the center of the paw pad or between the toes. Its usually a round, white area right in the middle and is very painful when touched. These types of corns or warts dont seem to be caused by a virus and may have more to do with friction or pressure on the paw pad.

How To Treat Dog Warts At Home

The majority of warts will simply go away on their own as your dog gets older, their immune system learns to fight the virus. Vitamin E for dog warts is probably the safest home remedy, and applying vitamin E gel for 2 to 3 weeks has shown great results in one study.

When to remove warts on dogs

Dogs will need to have warts removed when:

A veterinarian asks for a pathology report and suspects the wart is cancerous.
The wart is in such a place that it causes aggravation, such as lameness when its on the paws or irritation/obstruction in the throat, mouth, or inner eye. Or if its making grooming difficult, like in this video:

The wart is regularly scratched open and bleeding or has become infected.
The wart has been present for over six months and shows no signs of going away.
If the dog undergoing immunosuppressive treatment or otherwise has a compromised immune system and cannot fight the virus itself.

Dr. Greg McDonald from McDonald Animal Hospital in Santa Barbara explains the basics of removing dog warts. First, he cautions that the wart is more likely to be adenomas or benign skin cancers if you have a poodle or Poodle crossbreed dog (especially an older one).

He prefers to remove adenomas because they can bleed if the dog scratches at them. He recommends that pet parents do not try to remove their dogs warts themselves.

Small warts can be cryogenically frozen off with a product called Verruca Freeze. The wart is isolated with a cone and frozen; the wart will typically drop off. Its best to remove warts while they are small. Your vet may also use a laser.
If warts have become too large or numerous, your vet may remove them surgically.

Vets can also try a variety of medications to get rid of the warts. Most of these, like vaccines, are designed to boost the immune system to allow the dog to fight . But if your dog is on any drug that suppresses the immune system, they may reduce the dosage or change the medication to allow the dog a chance to fight off the virus.

Home Remedies For Warts On Dogs

Avoid home remedies for dog warts

The internet is full of potentially dangerous advice like apple cider vinegar or even garlic, which is toxic to dogs. Since most dog warts simply go away on their own, applying vitamin E gel will usually speed up the process naturally and safely.

Check with the vet

Always see a vet about growths on your dogs skin to ensure they are not potentially cancerous. Treating them at home can lead to incorrectly diagnosing your dog and ending up with a much more serious issue on your hands.

Can I use apple cider vinegar for dog warts?

Do not use home remedies for dog warts like apple cider vinegar. The high acidity can cause a chemical burn that would be extremely painful for your dog. Ignore any internet advice that tells you this is a good solution. Even diluted, there is no reason to believe that ACV is a good or effective option.

What is the cost of treating your dogs warts?

Unfortunately, the average cost of dog wart removal can range between $300 and $1000. Still, you must see a veterinarian who can anesthetize the area, particularly if it needs to be surgically removed.

What do dog warts look like?

Dog warts, or canine papillomas, often resemble small, irregular, cauliflower-like growths. They are typically flesh-colored, gray, or white. They can appear as single growths or in clusters, predominantly around the mouth, eyes, face, or paws.

How long are dog warts contagious?

Dog warts are most contagious when they are still growing and undergoing changes. The contagious period can vary, but once the warts are fully developed and start to regress, they typically are less contagious. It is generally advisable to isolate dogs with warts from other dogs until the warts fully resolve.

Why does my dog have warts?

Dog warts are caused by the canine papillomavirus, which infects dogs usually through a break in the skin. Young dogs with developing immune systems, older dogs with declining immune function, or immunocompromised dogs are more susceptible to the virus, leading to the development of warts.

Final Thoughts

Most of the time, warts on dogs will go away on their own after a few weeks or months, depending on the type of virus and your dogs immune system. Always have any growths on your dogs skin checked out by a veterinarian to make sure it is benign and to determine if it needs to be removed.

Avoid home treatments for these kind of skin issues. Unfortunately, misinformation on the internet is rife, and while most home remedies are simply ineffective, some are actively dangerous and can harm your dog.

Meet Your Experts

Tamsin De La Harpe

Author

Tamsin de la Harpe has nearly two decades of experience with dogs in rescue, training, and behavior modification with fearful and aggressive dogs. She has worked closely with veterinarians and various kennels, building up extensive medical knowledge and an understanding of canine health and physiology. She also spent two years in the animal sciences as a canine nutrition researcher, focusing on longevity and holistic healthcare for our four-legged companions.Tamsin currently keeps a busy homestead with an assortment of rescue dogs and three Bullmastiffs.