Around a week ago now we picked up 2 female rats (approx. 10 weeks old) who began sneezing soon after being exposed to their new home. We originally thought these were new home sneezes but they have both progressively worsened, as shown by the videos attached. Both are seemingly eating, drinking, and grooming just fine, although Blue, the smaller rat, seems pretty lethargic. Lumi, rat #2, seemed fine after a few days, but has begun sneezing wetly recently. We believe that Blues constant sneezing has passed the infection to Lumi. We're most worried about Blue and would like to put her on doxycycline immediately, but have no experience in doing so. Here's, I believe, all the information needed: Blue's weight: 102g Blue's symptoms (further illustrated by attached videos): wet sneezing, occasional clicks that seem to come from her nose, almost constant sniffling, lethargy, possible piloerection of fur at times. I haven't noticed any excess porphyrin buildup, but the walls of their favourite hide are covered in porphyrin splatters. We have 100mg capsules of doxy available. I know @lilspaz68 is particularly knowledgeable about dosing, so I hope she/he doesn't mind being tagged here. Video1 Video2 Video3 I'll update with info regarding Lumi's weight as soon as I can get her on the scales.