So I've posted about this a few times before, but wanted some input. Peanut has had one nostril that keeps getting white mucus in it (right side). She's been to the vet several times and the vet hasn't seen anything inside the nostril and she's been treated with baytril and it goes away. Then it comes back! She eats, drinks, has no other issues and acts normal. I have a humidifier in the room which seemed to help for a while and now it's back again. Her teeth are fine, her ears are fine. Lungs sound good. I'm baffled. Any ideas??
Extra info- gets fresh veggies everyday with rodent blocks. Gets shelled nuts to wear down her teeth. She's 4 years old.