Okay I will again give this great website URL for you to check out,
http://www.catsinternational.org/ when you go there click on "articles" then click on "fun and useful info", check out what they say about allergies, they talk about allergens and ways to minimize it. I have been giving out this website on here for a while now, it is very informative, if I keep doing this maybe someone else will beat me to it one day and when I get on here I will see it.. and say "Eureka, I think they've got it!" but remember "drgnrdr" typed it first...LOL Good luck with it, hope this helps.