I hate to dredge up an old post, but this has occurred to me as well. My cats, both around 10 years old now, sit on a pillow on my lap or on the arm of the sofa. Even if I were to puff deliberately away from them, they would probably inhale some of the smoke. Outdoors for me is cruel and unusual punishment most of the year -- far too hot and humid -- and I have no balcony or back yard. I guess if I were to take up a pipe again, it would have to be only during cooler weather!