^^ as for pets, Another 5 seconds of searching and 4 keystrokes

http://scholar.google.com/scholar?hl=en&q=Secondhand+smoke+pets&btnG=Search&as_sdt=0%2C39&as_ylo=&as_vis=0

Interestingly the bottom result on the first page addresses exactly the effects of secondhand smoke in cars with children. Google is your friend.

__________________
TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth