Anke - you type more quickly than I do, and this says pretty much the same thing as you have (this is happening more frequently to me - must learn to type faster
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I think it's just an illustration of a point - putting all your eggs in one basket. We have thought of this with Hebridean sheep, which are found only in Great Britain (apart from one or two flocks in the Netherlands). It is always better to have a second and third population on the other side of the world, in case of a disease outbreak - not necessarily one we already know about. For the Shetland Breed, there are plenty of animals in North America.
There seems to be an ongoing rivalry between those who live on the Shetland Islands and those who live on mainland Britain, where the Shetland Breed is concerned. On Shetland, the breed is their commercial sheep, in the rest of Britain it is a minority breed, once rare, so people's attitudes to their sheep will be different.
I am surprised that the Shetland Meat /Wool name is only being used by a tiny handful of organic breeders on the Islands - I think the rest of the sheep farmers on Shetland have far more reason to be annoyed by that than we do on mainland Britain.