Hi BL
Sorry it's taken a while to get back to you but I unexpectedly spent the past few days in hospital

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The thing with the scurred Soays is interesting. It probably only applies to Soays on St Kilda or in other feral flocks if there are any. There are all sorts of research projects going on with the sheep on the island and one was to look into mating behaviour, which seems to be a bit like a red deer rut. The biggest tups, with the biggest horns, will fight to win themselves a harem and all the lesser tups lurk on the edges of the groups, hoping to nip in for a quick bit of loving when the main man is distracted. All the fighting to win and defend territory uses up a whole lot of energy, which is fine when there's plenty of grazing to go round. However, the sheep population of St Kilda suffers from periodic crashes when numbers have outstripped food. This is when the scurred tups come into their own - the big boys have worn themselves out maintaining their positions, and needing extra energy for those horns, whereas the scurred boys, who have always had a tougher life on the less favourable grazing areas, are still going strong when all around them are dropping like flies. In the absence of big-horned males, the surviving ewes will mate with the scurred tups, so keeping the population alive and also perpetuating the scurred gene, which is present in ewes as well as tups. I am assuming that scurs are a recessive trait, otherwise there would be no subsequent re-emergence of the big horned males. I find the whole thing fascinating, especially as previously scurs had been seen as completely undesirable, whereas without them the sheep of St Kilda would surely have died out by now.
The only 'use' for scurs in a farm environment might be that scurred Soay tups fight less than big horned ones - but I have no idea if that is so. Soay tups are aggressive little fellows, which is understandable given their feral rutting behaviour, but I don't know if because of their different behaviour in years of plenty, the scurred tups might be naturally less aggressive.
As for your 5 horned Heb tup - you are right, unless you give him a go you won't know what he will throw. I feel that too much selection took place in the Hebridean breed at too early a stage, based only on some big assumptions. The breeder who bought our 6 horned tup took a big chance in using him over his whole flock, but it has paid off, not to mention the increased knowledge base from using less than 'perfect' breeding stock.
Thanks FW,
will try to post photo in a week or so, I'm taking the twin of the 5 horn who is a nice balanced straight 4 horned and is in order, will have a thought re the 5 horn, but i guess from what you are saying ( if he is in order else where) unless i took him / allowed him to develop and used him ( if he hit the mark) i won't know?
Re the Scurred other than maintaining the genetic diversity of the breed is there other advantages?
You also mention they assisted in Soay breed Survival - why was that?
Sorry if too many questions
Thanks
BL