When we got our first five lambs, we kept them in our 50 foot by 50 foot fenced in chicken aviary, using an empty chicken coop for shelter.
we could use our dogs to bring them into our fenced in back yard (50×50) and practice herding.

We have since cleared and fenced a half-acre, built a “sheep shed”, and are continuing with a second fenced field as our flock grows. (4 lambs this spring!)