What Causes Warts in Dogs?


A virus called papilloma causes warts in dogs, and the medical term for it is canine papilloma. Warts are a common occurrence and may show up on any part of the dog’s body. Warts are generally benign, and they rarely transform into cancerous growths.

Warts mostly appear on the face, around the dog’s mouth, but they can also occur on the legs, abdomen, muzzle, or any other body part. They occur in varying sizes and usually take a few weeks to appear after the virus infects them. You may find either a singular wart growth or a bunch of warts growing together, and you need to remove warts safely.

Warts are not harmful, but they may pose a problem to the dog while eating or swallowing. When the canine accidentally bites the warts, they can be very discomforting. However, except in rare cases, warts begin to shrink and slowly resolve on their own in about 12 weeks.

How warts are caused in dogs

Weak immune system

Papillomas are highly contagious and can easily infect the dogs with low levels of immunity. Warts affect young pups with developing immune systems and senior dogs with weakened immunity more frequently.

Direct transmission

An infected dog can pass on the virus to other dogs, when it comes in contact with the others. The virus spreads through the mouth, nose, or any openings on the skin surface. Insects can also carry the virus and spread it through bites.

Indirect transmission

Virus that is shed on surfaces by the infected dog can survive up to two months. The virus can easily transfer to other things like toys, beds, or food. When other dogs come into contact with these contaminated items, they become infected as well.


Warts can appear as a reaction when your dog is vaccinated. Vaccines causes warts in dogs as a side effect.


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