The Effect of Smoking on Dogs and Cats

We all know that smoking tobacco products is harmful to the smoker as well as their family who are exposed through second and thirdhand smoke. But what about the pets? Unfortunately, the pets are effected as well when they breathe in the toxic fumes or ingest the residue left behind in the environment. When burned, cigarettes release an amazing 7,000 chemicals including ammonia, arsenic, benzene, carbon monoxide, formaldehyde, hydrogen cyanide, lead, mercury, nicotine, toluene and uranium-236. Beside the smoker, other family members suffer secondhand exposure when they breathe the fumes. Eventually, the chemicals settle out of the air onto surfaces creating a residue. Thirdhand exposure occurs when chemicals are ingested, absorbed through the skin or inhaled through dust. Pets may also come into contact with these chemicals when they lick a smoker. These chemicals persist in the environment for months even with cleaning.

Dogs and cats who live with a smoker have an increased risk of cancer. The length of the dog’s nose will determine what kind of cancer they may develop. Dogs with long noses like Greyhounds and Dobermans have higher risks of cancer developing in their nasal passages because the cancer causing chemicals settle out there. The chemicals make it to the lungs in dogs with short and medium length noses.  This predisposes them to lung cancer. Cats have increased risk of lymphoma and squamous cell carcinoma of the mouth when they live with a smoker. The risk of a cat developing lymphoma increases by three times when they live with a 3 pack a day smoker. The squamous cell carcinoma occurs when cats groom the toxic chemicals from their fur. The risk for this aggressive cancer increases two to four times.

To prevent secondhand smoke, many people will smoke outside. Unfortunately, this does not prevent thirdhand exposure to pets and children because the toxic chemicals from tobacco contaminate the smoker’s hands and clothing. The chemicals are transferred to the children and pets through thirdhand contact. As mentioned above, pets are at the greatest risk if they lick the smoker.

For more information of the effect of smoking on pets, please check out the FDA website. Here’s the link: http://www.fda.gov/AnimalVeterinary/ResourcesforYou/AnimalHealthLiteracy/ucm520415.htm

Sources:

-Bertone, E.R., et. al. ‘Environmental Tobacco Smoke and Risk of Malignant Lymphoma in Pet Cats’ J. Am. Epidemiology 2002; 156:268-273.

-Matt, G.E., et al. ‘When smokers move out and non-smokers move in: residential thirdhand smoke pollution and exposure.’ Tobacco Control 2011: 20(e1) 1-8.

-Reif, JJ. et al. ‘Cancer of the oral cavity and para-nasal sinuses and exposure to harmful tobacco smoke in pet dogs’ Am. J. Epidemiology 1988:  147(5):488-492.

-Schick, S. ‘Thirdhand smoke: here to stay’ Tobacco Control 2011:  20(1):  1-3.

-‘Be smoke-free and help you pets live longer, healthier lives.’ U.S. Food and Drug Administration Animal Health Literacy, last updated 9/22/16. www.fda.gov/AnimalVeterinary/ResourcesforYou/AnimalHealthLiteracy/ucm520415.htm

Published by kristennelsondvm

Dr. Kristen Nelson grew up on a farm in Watertown, Minn., where she developed a deep love for animals of all kinds. She received a Doctor of Veterinary Medicine degree from the University of Minnesota, College of Veterinary Medicine. Kris then completed a small-animal internship at the prestigious Animal Medical Center in New York City. In addition to writing and speaking, she cares for small and exotic animals in Scottsdale, Az. Dr. Nelson is widely quoted in the media. Her credits include Ladies’ Home Journal, USA TODAY, the Los Angeles Times and numerous radio and television interviews. Dr. Nelson has written two books, Coated With Fur: A Vet’s Life and Coated With Fur: A Blind Cat’s Love. Kris and her husband Steve share their home with rescued cats, birds and a dog.

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