The first year, with 20 lambs, we got them onto creep as well as the shepherdess, we tried to always have milk in the bucket and because of the age range I weaned in two stages at probably around an average of seven weeks, they had gone to market fat by the middle of August (well except the girls I kept). I slowly watered the miilk until they were just having water.
Last year, same number, had read should wean at six weeks and I was very strict about it. They did not fatten nearly so easily had to have feed supplements in the autumn and they went mid October. That said it was a very wet year which seems to have held up the finishing.
Also most both years were a little decrepid in some way, ill, triplet, abandoned by mum, mum died etc.
They are happy with cold milk after two weeks, the bucket doesn't get so horrid.