We have ended up with twin lambs in September, by cesarean, to a seven year old maiden ewe, courtesy of our neighbours wandering tup! Lambs and ewe doing fine but there are a heck of a lot of flies. I've put spotinor on the ewe and I know they recommend a half dose for lambs under a month old, but I can't find anything annoy how old they need to be too use it. Hope that makes sense and that someone more knowledgeable than me can help!