Does consuming grains (such as barley or wheat) increase the nutrition to sheep and give the milk more benefits?

No. Grass is the best quality feed for sheep and makes the most nutritious milk. At Spring Sheep we provide our sheep a mostly grass-based diet as we believe this is the best option for their health and highest quality milk. At certain times of the year, we will augment this diet with other feeds (like grains) as they require it (e.g. just before lambing). While grains are suitable for top-up feeding like this, it is not the natural diet for sheep and therefore not suitable for 100% of their intake.For more about the benefits of Grass-Fed Sheep Milk, see the following post. What are the benefits of Grass-Fed Sheep Milk?