Oh no, that is such a shame. Polled Hebs ie no horns, are so rare, as are top-knots. This is because until recently they were not registerable with the HebSoc. Just in the nick of time they have been saved and are now registerable, but perhaps your unreg ones had turned up in a registered flock but were sold as unregistered way back. Polled Hebs are genetically multi-horned, and usually have multi-horned lambs. We haven't been able to work out how the polledness is inherited - there are so few, but none of ours has ever had a polled lamb, although one of our top-knotted ewes has had a top-knotted lamb, although most don't. It's very frustrating. My old avatar on the left has a tendency to sire some top-knotted lambs and in fact amongst those big horns he has the remnants of a top-knot himself. So it could be that the male line is more important than the female, or that the trait needs to come through both parents. Last year we bought in 3 top-knotted ewe lambs, one of which is also polled - she is the first I have seen to combine both traits