Rat sneezing but otherwise fine?
Basically over two weeks ago I bought two male rats, after a few days I noticed one was ill, not eating or drinking and lethargic, I took them to the Vet and they were both put on antibiotics since it was an URI which can be passed on, and he was soon feeling better, but about a week ago I noticed excessive sneezing beginning, I thought It was the bedding (I was using carefresh, which though is meant to be dust free, was actually covered in dust!) so I changed them over to shredded plain paper, he's eating fine and has put on 60 grams since he's vet visit, he's very active and playing with his brother but he's still sneezing, obviously I'm worried.
I keep looking for the red mucus stuff around his nose and eyes and don't see any but I'm not sure if that's because he's a very clean little guy.
Is it something in the bedding maybe? Or a cold or allergy? or another URI?
Should I make another vet appointment?