If you really love your pet, stop smoking.
We all know that secondhand tobacco smoke is bad for people, but ongoing research indicates that it poses health risks to pets as well. Secondhand smoke has been linked to lymphoma in cats, as well as lung and nasal cancer in dogs.
Arden Moore, a nationally recognized pet expert, says that many pets — especially cats — spend most of their lives indoors, subjected to air pollution left by tobacco smoke. And because their body mass is so much smaller than humans, they are at increased risk of being adversely affected by that smoke. Smoke particles can also be ingested by cats, dogs and other pets when they groom themselves and lick their fur.
(From the Washington Post, Jan. 14, 2008).