The group consisted of an 8 lb. female, a 7 lb. male and two months later, a 5.5 lb. male. RNS, also known as chronic rhinitis often involves multiple factors. Husbandry and the design of enclosures certainly have an impact on the frequency and degree of infection, but this is a bacterial infection usually of the gram-negative type. RNS is particularly troublesome in large collections or collections in which species have been mixed. RNS is classically difficult to cure and has a nasty habit of regular reoccurrence.
Prevention is key and starts with perfect husbandry and strict separation of species.
As implied by the name, symptoms include runny or bubbly nose and sometimes irritation of the eyes. Upon arrival of the initial pair, the female was extremely symptomatic with a buildup of mucous around the nose and the male was similar but to a lesser extent. In researching the proper treatment, I found first hand experience of multiple success with IM injections of oxytetracycline in concert with antibiotic nasal drops. I found some contradiction in reference to dosage. Some sources recommend IM injections of 5mg per kg, but my sources noted a dosage of 10 times that or 50 mg per kg.