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Does one cigarette smoked outside hurt my dog's lungs or cause cancer?

Updated On September 23rd, 2025

Pet's info: Dog | German Shepherd | Male | unneutered | 1 year and 4 months old

I usually smoke once in 8 months so yesterday I was craving and I had my one cigarette my dog is always beside me I was out of the house in my garden I m 6ft tall and my dog was on ground and I was smoking I don't know smoke was going down or above in the air and also don't know about the smell but my question is would that hurt my dogs lung and cause him lung cancer in future in his later life? I did mistake I m upset as I quit smoking for him only and do any vet doctor also smokes then how ?

4 Answers

Most Helpful Answer

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Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on March 25th, 2017

No, smoking one cigarette around Bruno will not cause him lung cancer. As I mentioned in a previous question you asked about this same topic, he would have to be exposed to high levels of environmental tobacco in order for that to occur, such as smoking multiple times a day in the home with him right by your side. Smoking one cigarette outside will not give him lung cancer. I personally don't smoke, never have, but if you want to have a smoke, then I suggest leaving Bruno in your home while you have one outdoors.

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Other Answers

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    Answered By Dr. Melanie, BVSc MS

    Veterinarian

    Published on March 25th, 2017

    This limited exposure to cigarette smoke will not cause lung cancer. I would be concerned about Bruno's health if he was exposed to cigarette smoke in the home multiple times a day, but twice it's not something to worry about. I do not recommend having anyone smoke around him, as secondhand smoke isn't good for dogs or humans. There is no need to be concerned about Bruno.

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    Answered By Ann Dion, DVM

    Veterinarian

    Published on March 25th, 2017

    Hello. A small amount of second hand smoke for your dog will not be a big concern. The risk is the same as it is for a human, a small amount once or twice a year is not a concern. Smoking all day long with your animal in the house does cause concern however, for both asthma and cancer.

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    Answered By Destini R. Holloway, DVM

    Veterinarian

    Published on March 25th, 2017

    I can understand your concern. Throat and lung cancer theoretically can happen but isn't very commonly seen in pets exposed to cigarette smoke. Also it would take repeated daily exposure to large amounts of smoke for this to even remotely be a concern. A one time exposure isn't anything to worry about, but if this is a repetitive habit then you can discuss your concerns with your friend as best you can. Some pets however can get throats and lung irritation form cigarette smoke, so if you see coughing and breathing problems then it's best to keep Bruno away from it.

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