Judging from my experiences with goats and now hair sheep over the years, a wide assortment of plants would probably work. The only ones I know of that are violently poisonous are oleander (which isn't hardy in WV in any case) and the azalea/rhododendron family, including mountain laurel. There is a whole array of evergreen, vigourous, easy to propagate shrubs used in the landscape industry, several of which have escaped cultivation and now qualify as "invasive exotics" You can probably find some near you already growing to test out and propagate from. Privet, "ligustrum"(a larger-leaved privet), bamboo, eleagnus, honeysuckle come first to mind. Incidentally if you are mowing a
lawn anywhere around you can make silage in bags or barrels whenever you mow.