For six years we had our neighbour’s 3 alpacas in our paddock. Advantages: they mowed the grass and were decorative. Drawbacks: they caused a lot of damage by digging and from their peculiarly toxic waste; and were annoyingly passive / aggressive. So we moved them off, spent last winter filling in all the holes with a ton of topsoil and re-seeding, followed by a programme of regular harrowing, mowing and rolling to make the field ready for our son’s wedding on midsummer’s day (where we had our own reception a few years decades ago).
Now what? The answer is: sheep. Peaceful, munching grazers with no obvious drawbacks. A young farmer in the village has put 7 pregnant Poll Dorset sheep in the paddock. Result: pastoral scenes, evenly cropped grass, and a damage-free field – with pre-Christmas lambs in prospect. 
The Dorset breed of sheep comes in both poll and horn varieties. Here are specimens of each kind photographed at a recent show in Dorset. The breed is hardy (as befits Hardy country), and unusually they can lamb 3 times over the course of 2 years, making them a productive option for a young farmer building up his flock.
ROLLING HARBOUR GALLERY 