Is a Smoker in Your House Killing Your Dog? Psychology Today The effects of secondhand smoke on pets Can thirdhand smoke hurt my pet? Thirdhand Smoke Resource Center Veterinarians warn that vape clouds in the home are just as harmful as regular smoke. Pets can develop allergies, coughing, and breathing difficulties, and citrus flavored e liquids are especially toxic, settling on fur, Is Second Hand Smoke Bad For Dogs? Secondhand smoke and e cigarette aerosol exposure in dogs and cats: A scoping review with implications for smoking cessation among pet owners