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Anesthesia of marmots with sodium pentobarbital, ketamine hydrochloride, and a combination of droperidol and fentanyl.

Three different anesthetics were tried on wild marmots to immobilize them sufficiently for intra-oral physiologic measurements and dental examination. Essentially the same procedure was performed or attempted on 15 animals. The droperidol (20 mg/ml) and fentanyl (0.4 mg/ml) combination gave better results than sodium pentobarbital or ketamine hydrochloride and was therefore used in most instances. We concluded that the dose rate should be adjusted to the nutritional state of the animal as well as to the absolute weight.