Scanning is one thing but survival through to weaning is just as important. Using actual data along with SIL evaluations we can accurately assess the survival values of individual animals. There needs to be at least 5yrs of data and a reasonable sized flock for this data to be meaningful. Many things can affect survival including environment, weather at lambing, contour, ewe condition, feed covers, ewe stocking rate but certain lambs survive where others perish. It is these ewes producing the consistant survivors we want to identify.