Frequently Asked Questions Thirdhand Smoke Resource Center How Second Hand Smoke Affects Your Dog PetGuide Did you know your pet may be silently suffering from smoke or vape exposure? Find out how secondhand marijuana, vaping, or smoking can harm their lungs, behavior, and overall healthand what Your dog can't tell you they're breathing in secondhand smoke, but their lungs feel it. Protect your pets by keeping your home tobacco free. #QuitForThem #NationalDogDay Your dog can't tell you they're breathing in secondhand smoke, but their lungs feel it. Protect your pets by keeping your home tobacco free. #QuitForThem #NationalDogDay