Zebra (Equus zebra hartmannae and E. burchelli antiquorum) were subjected to stress which gave rise to elevation of cardiac rate, haematrocit, plasma osmolality and plasma levels of glucose, lactate and creatine kinase. These changes were very similar to those observed in animals actually suffering from capture myopathy. It was therefore tentatively concluded that incipient: signs of shock and therefore of capture myopathy were evident in the chased group of animals. Keywords: Alarm reaction, Anaerobic metabolism, Creatine kinase, Etorphine hydrochloride, Gluose oxidase, Immobilising drugs, Lactate, Manhandled, Osmolality, Plasma glucose, Severe stress, Shock syndrome, Skeletal muscles, Tranquillisers.