Bryan,
I did not think that you were singling Smoking out at all. My comment
was toward the "general" consensus, that Smoking (or getting rid of it)
is the answer to all our respiratory problems. That is far from the case.
But, your confidence in the reliability of a "medical option', gives me pause.
It is difficult enough, to acquire Empirical Evidence, as relates to those
who can actually verbalize their condition. I just don't see how a Vet
could quote such a preponderance of opinion, when there are no Trials
or Papers to support that. The specific issue being, related respiratory
problems, of an animal, as related to repeated casual exposure of
Tobacco Smoke.
NOW, I do know of studies of Birds (mainly Canaries) which have been
utilized to do Trials on Gasses found in Mines. And, subsequently data
has been accrued on the sensitivity of some Fouls, being greater than
that of Humans. I do not know of any similar studies done on Dogs.
I would urge you to take comments like that "with a grain of salt",
specially if it may be coming from a devout Non-Smoker...