FCV infection

• Symptoms of FCV include fever, mucus discharge from the eyes and nose, sneezing, hoarseness and ulcerations in the mouth.
  
  

FCV joint pain

• In some cats, widespread arthritic-type pain may present in multiple joints after a bout of FCV.
  
  

FCV and secondaty infections

• If a secondary bacterial infection develops, FCV can progress into pneumonia. Symptoms of pneumonia include labored breathing, lethargy, and dryness of nose and mouth.
  
  

FVR symptoms

• Infection with FVR causes coughing, sneezing, nasal discharges, fever, dry eyes, or loss of appetite.
  
  

FVR and ulcers

• Some cats develop pinpoint or dendritic ulcers on their corneas when infected with FVR.
  
  

FVR and secondary infections

• In most FVR cases, a cat allowed to rest and recuperate will recover within 4 to 7 days, however, any secondary infections can prolong the appearance of symptoms.
  
  

Diagnosing

• Veterinarians have to use specialized lab tests to diagnose different types of cat flu---especially since they share so many symptoms with other types of feline respiratory disease.