Last spring we bought 3 lambs and needed a simple shelter that could be made quickly. The shelter also needed to be movable so the sheep could be relocated to fresh grass.
And this is what we came up with.
3 high beams with boards as a base. In each corner a post, which were connected on the top by boards. We added some cross braising and then closed the walls with spruce life edge planking. A tin roof on top and finished was the shelter.
And this is how it looks after 6 months of use by the sheep.