I'm curious to know about the pollen entering the room too...my 8 mo old DD tested positive to dogs 2 months ago. She was getting bright red cheeks every time I fed her, which I thought was food related, but turns out it was the dog. Since then we have taken measures to reduce the dander and the redness disappeared. Then pollen season started and she started having horrible problems with her eyes and nose. Keeping the house shut up helped a lot but she still would get the itchy eyes from being out and about. A week ago she was put on zyrtec for the remainder of the month, and that helped immensely. But the past few mornings she has woken up congested and with a goopy eye. She gets the zyrtec soon after in the morning so I have been thinking the prior dose has worn off. We keep her door shut most of the time with an air purifier in there so I have been wondering if it is the pollen getting in there somehow, or if it's something else. DS’s preschool teacher said she woke up the other morning with her eyes swollen shut from the pollen, but I didn’t ask her if she keeps the house shut up or if her windows are open.