Age is not the most important factor when determining anesthetic risk. The overall physical and biochemical health of the patient are by far he most important factors that determine anesthetic safety. We require at minimum a complete physical exam and preanesthetic blood profile to be performed by your veterinarian prior to the appointment to detect any health issues that may need to be addressed before anesthesia. We also require a heart workup if a murmur is detected by your veterinarian. Other health conditions may require a more through workup.