Evaluation of sedation and analgesia protocols with xylazine and two rates of morphine by continuous infusion in stationary horses undergoing laparoscopic castration. Cookies on CAB Direct Like most websites we use cookies. This is to ensure that we give you the best experience possible. Continuing to use www.cabdirect.org means you agree to our use of cookies. If you would like to, you can learn more about the cookies we use. Close Find out more Home Other CABI sites CABI.org Plantwise Knowledge Bank Invasive species About Help