[basjoos]

Depending on how fast your grass is growing, they would have no problem keeping up during the growing season, but would require supplemental feeding (hay) during the winter. Sheep stocking rates vary depending on the time of year and how productive the pasture grass is. Typical stocking rates on permanent pasture for the eastern US is 2 to 6 sheep per acre for normal size sheep (higher for miniature sheep breeds). Since I have other pastures for my sheep, I rotate the sheep into my yard as needed to keep the grass down. I have about 3/4 acre of lawn around the house and bring in 4 to 10 sheep for a few days every week or two during the peak grass growing season.

Sheep also have other fringe benefits for the garden. Any wasted/surplus feed hay can go on the vegetable garden either as mulch or as ingredients for the compost pile (since it is already pre-manured by the sheep)