Wellness testing, performed routinely on apparently healthy birds, screens for underlying, inapparent problems. Veterinarians also use test results in conjunction with physical examination findings and the owner’s account of the bird’s history to diagnose illnesses. Blood tests include the complete blood count and chemistry profile. Other tests your veterinarian may use to assess your bird’s health and diagnose disease include Gram’s stain, culture and sensitivity testing, parasitology, X-rays, laparoscopic surgery, cytology, histopathology, virology, and genetic (PCR) testing. Post-mortem examination after a bird dies may be recommended to determine the cause of death.