Many groups, both veterinary and otherwise, are encouraging owners of pets and animals inside and outside the home to stop smoking. An article in the USA today quoted veterinary oncologist Aarti Sabhlok, who treats over 40 pets a week for cancer at the San Francisco Veterinary Specialists and said:

An animal in an environment with constant exposure to a toxin, and that would include cigarette smoke, could be at greater risk of developing tumors.