Hi everyone, I purchased my first Guinea pig from petsmart yesterday. I now know how terrible of a choice that was and I will always rescue from now on. Anyway, I noticed him lights sneezing yesterday and he had a little discharge on his nose. He was still eating a ton and drinking his water and acting happy. But this morning I took him in to the vet anyway (not at petsmart because I didn't want them treating him and keeping him like that) and sure enough he has a URI. They gave me doxycycline to give him twice a day. Has anyone else used this medicine and had good results? He's supposed to take it for two weeks and I'm just so scared. Any advice would be welcomed. Gatsby is such a sweetheart and I'm really hoping I caught this early enough.