I wondered how the people doing the milking could know and recognise which animals they had milked and which they had not, for as soon as the cows were milked they were released. They answered that all the reindeer have their own individual names and the people know exactly which is which. This struck me as amazing since their appearance is so similar, their colour (which changes every month) is the same, and the size varies according to age. It was quite amazing to me that they could recognise these animals when they were swarming about like ants on an anthill.