When general anesthesia is required, we have had success in using the minimum of preanesthetic sedation, inducing with isoflurane and oxygen via a face mask, and maintaining with isoflurane. The Xolos seem to handle this very well and recover quickly. Monitoring both during anesthesia and after recovery cannot be over emphasized. Xolos are prone to hypothermia due to their lack of a hair coat and supplemental heat should be provided. Be careful with heating pads, etc. as the same lack of a hair coat also makes them susceptible to burns.
Temperature controlled cages seem to work very well.
Intravenous fluids before, during and after anesthesia help to maintain circulation and temperature.