Use a hay rack for feeding your animals easily with hay. It is usually a moderate source of protein and energy for sheep and lambs. Veno produces different sizes of hay racks, depending the size of your flock(s). There are models available with wheels or only withfeets. It is a very good way to feed your animals extra during a dry period.
The important thing about hay is to feed the right at the right time. There is no “best”. From an economical standpoint, the “best” hay is that provides nutrients at the lowest cost. Palatability is important to the extent that the more sheep refuse the higher cost it will be.