Beardies are very resistant to respiratory infections. However, prolonged exposure to low temperatures, improper humidity, and poor cage conditions could result in respiratory problems. Treatment for this type of infection usually involves administering antibiotics and raising the ambient temperature of the environment. Symptoms include gaping, forced exhalation of air, puffing of the throat, a puffed up appearance of the body, and lack of appetite. In some cases, the mucus may accumulate in the mouth and/or emerge from the nostrils. If these symptoms are present the illness is usually well progressed and an immediate visit to the vet is necessary for treatment. Respiratory infections are nothing to something to take lightly. I have seen many reptiles die as a result of RI's and all of them could've been saved if their owner would've taken them to the vet sooner. At the first sign of trouble - take your beardie to the vet.