Yes, it definitely affects pets. Just imagine it affects a human standing next to the smoker so imagine 7 pound yorkie. I use to smoke everywhere in the house but once I got Maxi I only smoke in the bathroom as I dont want my baby to be affected by the choice I make.
I also quit for a while and now I smoke only couple of cigarettes a day ( I used to smoke 1 1/2 packs a day)
. That was done just for my sweet little furbutt.