This is a myth the derives from the days of old when barbiturates were used in anesthesia. The barbiturates were distributed in fat and did cause problems in some patients. Those drugs are no longer in use. Anesthesia can be performed on the cheap or it can be performed safely. Often the cheap anesthesia leaves the pet “hung over” for days. That perpetuates the myth of breed sensitivity. Our doctors customize each and every anesthetic protocol for ever patient.