Hi Thomas
As you know, we are not far from you, 1000 feet and with plenty of lush grass, willow etc. Our feeding regime is to feed a small amount of Carrs Champion Tup coarse mix for the last 6 weeks of pregnancy, and when snow is lying. Also ad lib home grown hay, plus a licky bucket and willow branches intermittently. The hard feed is gradually increased as winter progresses, up until lambing is finished, but not more than about 2 handfuls each ewe (my hands, not his
)
This year has been very different though, as they've had grass aplenty nearly all winter, and the ewes haven't been greatly interested in the hay. They do though take the coarse mix.
Our ewes are all together, in lamb and unbred, old dears, middle aged ladies, youngsters and lambs, so we don't go ott with the hard feed.
The amount you feed depends almost wholely on where you are, what your pasture is like, and the severity of the weather. The other factor is the age of the ewes. Most folk don't keep their ewes to such an age as we do, so differences in amount might reflect that, with a younger breeding flock being more able to cope on grass alone (plus licky bucket - Crystalix)