one idea our scanner told me this year was, when adopting a lamb onto a single ewe, the tub buckets you can get in garden centers etc, fairly big flexible, colorful things with 2 handles at the top? think they are called tubtrugs in mole valley, when the ewe is about to push the lamb out put it under the lamb so it ends up in the tub also collecting the fluid, then put the adopting lamb into the tub to cover it in the birth fluid, a hair drier to dry a wet cold lamb has worked well for me