i'm in the middle in regards to cleaning pens, used to clean out between every ewe but now i'll do it every few ewes, usually when the dung is 4-6" deep and the younger ewes start jumping at cake o'clock!
my pens are on concrete, so i find the first ewe in after a clean out always gets the dirtiest and needs the most straw, as the fluids can't go anywhere, once the dung is up abit, a lot less straw is needed.
straw and use a good dose of bedding powder between ewes, powder is more expensive than lime but seems much more absorbent and now where near as nasty on people or animals.
admittedly i tend to leave cleaning pens out for the students then towards the end of lambing i let the dung go cause i know i can just pack the hurdles away and clean up with the tractor.
Hi Dave, Never heard of bedding powder over here. Have you a brand name I can check out?