Better than nothing - but thats not exactly a glowing endorsement!
200g/h/d 18% ewe nuts does it for me from 1 month pre to one month post tupping. 189% TRUE % this year. NCM ewes x texel.
if only put out at mateing i would say bugger all diffrence if put out a few weeks before and lift in there untill rams removed they might
biggest gains maybe from fixing any nim probs before mateing and makeing sure iodine levels ok to make sure lambs live at birth
know guys in ozzie feeding lupins or faba beans lifting lambing % once again before to get ewes cycleing and also keep feed levels up to make sure lambs are set
trials have shown any gain from flushing can be lost if feeding drops during mateing