Hi I have had my guinea pig for 2 years and I am worried about the odor I breathe in that he causes from poop and dust and urine. It it harmful for humans? I have cystic fibrosis (lung disorder) and I where a mask when I clean out his house. When he's in my room for awhile I feel like I'm sucking in bad stuff. I clean him twice a week but he still stinks. Help! Am I harming myself?