I must totally agree that full disclosure is your answer. I am one that is extremely allergic to smoke; thankfully not pets! :-) I have on very rare occasions purchased fabric from up-front smokers-I have to have someone else open the package and toss it in the washer though. I recently opened a package that was from a smoking home, and I immediately had to grab my inhaler. I've been happier.
As a seller, I always disclose that I have a pet friendly home. I could no more ban my dog from my craft shed than cut my arm off. She does not have access to my fabric or finished items. Thankfully, 99.9% of my customers are pet owners, so I don't think it's been a hindrance to me.
Give it a try! Just be honest as to what possible allergens are in your house. Have fun, and best wishes! :thumbup: