My chinchilla room is very well conditioned and ventilated; however, there still is dust. I clean up after every little bath, but you just can't always get those little particles in the air. Whenever he's taking his bath or I'm just sitting next to it, I have difficultly breathing without this gagging sensation, but it's in my chest. It feels like there's something blocking the way in my lungs, but I don't know for sure. Coughing hurts very badly. Has anyone else experienced this before?