BAER Testing

BVNS performs Brainstem Auditory Evoked Response (BAER) testing which is used by many breeders and pet owners as a hearing test for dogs and cats. BAER is an electrodiagnostic test that determines if brainstem and hearing function is present in a patient.

alena baerThis litter of puppies were brought in and are shown happily undergoing BAER testing. Depending on the temperament of the patient, this test can often be performed with just mild sedation. Some more active patients may require a heavier sedation.

BAER Testing Description: Sounds (90 decibel clicks) are made with head phones in each ear (the same as in human hearing testing) and a recording is made from the skin over the head to obtain the waveforms pictured in the diagram. The first 2 waveforms tell us how the ear and nerve are working and the remaining waveforms tell us how well the brainstem is functioning. Pictured on the left is an example of a normal BAER test (with the multiple waveforms) and the on the right is an example of an abnormal BAER test (no waveforms).