It's definitely colder now, I've been keeping all the windows shut and turned the heat on a bit so they keep warm... they moved into their new cage about a week ago so I think you might be right about it being stress. I notice a bit of porphyrin around Koby's nose now too though, so I'm keeping an eye out. If it isn't gone after the weekend I think I'll take them to the vet to make sure everything is okay. They still seem fine in every other way, eating and drinking lots, very active, etc. Haze has sneezed a couple times though. I hope they're okay. :heart: