Sorry Pax you had to go throug this. 
This is one thing I've learned over the years since I am allergic to cigarette smoke is to ask if x place we are going to is smoke-free. I prefer not to go to a guest house when invited if I don't want to end up in the hospital.
Although I have pets, and they travel with us in our motorhome, it is something I would not hide for future buyers knowing some maybe allergic. Yes we keep our motorhome sparkling, we have towels/sheets anywhere a cat or dog could put his butt on or nail in but we can't prevent hair from flying. Thus the importance of mentioning to others who would come visit us.
Helene
Riding a 2014 Specialized Amira LS4 Expert - aka The Zebra!
2015 Specialized Crux e5 - aka Bora Bora bike