Smokers' dogs

Just curious, do any of you notice a difference in the condition of the coat of a dog that belongs to a smoker?
I've had a few in last week and noticed that they all had dull, dry coats with flaking skin. Perhaps there is no connection, but just wondered if you noticed this too? I only know that someone in the household smokes because I can smell it on the dog.

I've never really paid attention, but now that you mention it makes sense, besides them smelling like a smoke bomb, there coats do seem dry and dull. That has to be the worst, smoke bomb dog, yick.