Watching horses wade into a lush spring pasture is a satisfying sight after a long Canadian winter. Some simple management tips will ensure your horses can enjoy that lovely grass well into the next few months, weather permitting. Allowing your horses to overgraze one piece of land will create problems for both the animal and the pasture. Too much grass too soon can cause founder, and once the grass is gone, horses will often resort to eating weeds, some of which are toxic. As for the land itself, once the roots are exposed and trampled, the grass will not return and you will be left with a dry, weedy wasteland.