A 3 year old castrated male domestic shorthair cat was presented at a referral veterinarian because of one week of respiratory distress that progressed to open mouth breathing, dyspnea, and lethargy. Clinical signs were somewhat improved with oxygen but did not improve with maropitant, aminophylline, furosemide, or dexamethasone. He was referred to a specialty hospital and arrived unresponsive and not breathing. He was intubated, CPR was initiated, and the patient revived after 2 minutes of chest compressions and manual ventilation, and ultimately became mentally alert. Thoracic radiographs were obtained after the patient stabilized.