In Finnish Lapland, like in other Northern European regions by the Arctic Sea, aboriginal Sami people still base much of their daily income on reindeer. Earlier the Sami people followed their reindeer herds more or less all the year round, in nomadic fashion. Moving to fixed dwellings has created a problem in herding and guarding the property of the moving wild packs of hundreds or thousands of reindeer, which Sami families usually possess. Already for decades the mobility provided by Ski-Doos--along with herding dogs--has helped with the job. However, the era of limitless wilderness in reindeer herding is over. Nowadays hundreds of kilometers of reindeer fence separate Sami herding districts from each other. (Contains 2 figures.)