Betty has a little (very little) porphyrin build up around her nose that I think might be from lining her entire cage floor with Carefresh (it used to just be in the corner litterpan). I've been giving her dark chocolate, and plan on putting her in a steamy room nightly instead of weekly, but should I also take her into the vet and get her on some antibiotics? She's only going to be in this cage for about 3 more weeks before I switch her over to a FN. I also bought some Carefresh Ultra, which seems to be less dusty and will switch her over to that tomorrow. The only other thing that has changed that that her window isn't open as much any more (it's getting to cold), so she's not getting as much fresh air. She is still behaving normally and eating tons like she always does!