So now even I have seen this film. I have tried a little with herding dogs, and I can tell you: To learn to train a dog like that, takes years upon years! In addition it takes at least a year to train the individual dog, if it is of a good line. Then you must train also the sheep. The sheep on the film are well trained with herding dogs. To train goats to something similar can take longer than with sheep. Some people think it is impossible to herd goats with a dog, but I have done it and found that it is only different, probably because of the different flock structures of sheep and goats.
It will be interesting to hear your experiences of herding goats with dogs from different countries!