Earliest my Southdowns have arrived is 6 days early (this year), latest 9 days late (Winter of 2011). Generally reckon first-timers a day or two late, whereas old hands with twins a couple of days early. Having said that all of ours have been2 to 6 days early so far, including two first-timers with 2 day early singles and one with 3 day early twins! Badger Faced have generally gone a couple of days over. One year 2 of 20 Lleyns had a massive prolapse, went into labour and had to have Caesareans a week early. One set of twins delivered dead, the other alive, but neither ewe had milk, so had to adopt on. Don't like Lleyns.