I've searched for spoooks kids in their nappies but only found yakuts photo. My daughter is raising house lambs and I'm time sharing two lambs also. Anyone know the link or search words...I also tried Fraggle and nappies and treasures! Some nice/clever person?????
Is it a boy or girl? Girls are easier  Lambs are easier too, different structure round the bum, the nappy stays on better.
For the boys the nappy has to be longer. Eventually as baby grows, I cut one of the waistbands off and attach it to another, this extends it to cover all the little bits.
I also use a string, or whatever, pinned to the nappy under the chest, up through a collar and back down to the other side of the nappy under the chest. This holds the nappy up in the needed position.
Another configuration is to cut the nappy in half and staple it, carefully, to the end of a whole nappy. This gives you two waistbands.
I am sure you will work it out from the pictures, trial and error got me these ideas.
As I said girls are easier [}]
I've also added one of Fraggle taking his first run ever at "aunty" Kate's, this shows the polar fleece sleeve we use as coats This one had done many babies and is currently being worn by one of the twins, far better that the woolovers, they last for years, light showerproof too.