I know, I've heard that before.....unfortunately people don't look into the facts. From what I understand, it's mostly if your cat is an outdoor cat, and then it has to do wih cleaning the litter box. So, wear a mask or get someone else to clean it! I already told my husband that he has to clean the litter box when I'm pregnant...I also told him that I'm not allowed to use any cleaning products, so he'll have to do all the cleaning. haha I can't wait to be pregnant!