Thanks Chilli for the response. Today they haven't sneezed, which is definately an achievement! I started recently using carefresh instead of a cheap aspen, and it's been doing wonders. I have some meds here for the rats too (it's a long story, I got them from our family friend at the bird/pet shop) but to be safe I probably will wait till the rats pass to get a budgie. Thanks everyone thought for giving their opinions!

P.S: Sorry I was lacking the info about the myco going down with the new bedding in the first part, I just forgot to include that. Still, does anyone know why the rats shake when I hold them??

-Abby