The Great American Smokeout occurs each November with tips on how to kick the habit. But, did you know smoking can impact your pet’s health? When you light up next to Fido you expose your beloved pet to a potentially harmful environment. Nicotine, tar and carbon monoxide are just some of the cancer-causing substances found in second-hand cigarette smoke. Since animals rarely leave the house, the intensity and duration of their exposure is even longer than for humans.

Breathing the Same Air

People, cats and dogs metabolize inhaled nicotine in similar ways. Cotinine (a biomarker used to indicate nicotine exposure), can be found in the urine of dogs and cats exposed to secondhand smoke. As a result, small dogs that spend significant time with their owners can have cotinine levels equivalent to a smoker. Nicotine can also be detected on a pet’s fur. The animal receives additional exposure from licking his or her fur and ingesting the nicotine on the hair. Since pets live lower to the ground, they have contact with smoke residue that has adhered to carpets, upholstery and bedding.

Dogs and Owners Suffer

dogJust like people, dogs can suffer from smoking-related illnesses, including cancer and lung disease. Researchers know dogs exposed to secondhand smoke can suffer from constricted airways, increased mucous production and a buildup of carbon deposits. Carbon is a culprit in the development of lung cancer in smokers.

The heart is another organ impacted by smoking in people and animals. The most common type of canine heart disease, a thickening of the mitral valve, can worsen from exposure to secondhand smoke. Dogs also are at increased risk for nasal cancer, allergies and scratching.

In other similarities between people and animals, research shows that environmental smoke can change DNA in both species and lead to fatal conditions, like lung disease and cancer.

Felines Feel the Impact

catSmoking also affects our feline friends. Smoking appears to put a cat at increased risk for lymphoma, the most common tumor in cats. Oral cancer, a cancer in humans caused by tobacco use, is also linked to an increased risk in cats.

Oral tumor biopsies from cats with greater than five years of exposure to environmental smoke show a cancerous gene mutation.

Protect All Pets From the Puff

Give your pets a healthy chance at life by putting down your cigarettes. If you don’t quit smoking for your own health, do it for the health of your pet.

Where to Start

The good news is when you stop smoking, the damage from cigarettes lessons with time. There’s help for quitting.

  • Sign up for a smoking cessation class through the American Lung Association
  • Steam clean your carpets, curtains and upholstery to remove accumulated smoke from your home
  • Bathe your pet to remove any residue from the animal’s fur
  • Smoke outdoors away from your pet to prevent the re-accumulation of smoke on your pet and in your home
  • Don’t smoke while cuddling your pet in your lap or while driving with your pet in the car


Information adapted from Vetstreet