RE: KET. VS. ISO. I am a VET ! I agree with all the reasons for using Ket mentioned earlier - drug choices are always selected based on the indiviual patient. BUT another reason why many vets are getting away from using mask induced anesthesia is the risk of exposure to the techs and staff to the drug. OSHA and all. thanx, Benjamin A. Otten, DVM "The Toucan VET" Dr. Benjamin A. Otten, DVM Windham Veterinary Clinic Brattleboro, VT 05301 (802) 254-9412 [Posted in FML issue 2358]