Wel, recently i have been having lots of asthma attacks in my room. IDK what it is, but i think that it could be caused by the Carefresh litter and the dust it produces. My dad, when he was growing up, had lots of gerbils and he used Cedar in all of them. He never noticed any problems with them and one lived for 7 years. My question is, is cedar really bad for gerbils? And how much dust dose Carefresh litter produce?