Grass fed isn’t necessairily tough and stringy. Genetics and supplementry diet plays a role. Up here, with our winters, 100 % grass fed year round is not an option. Look at some of the cattle country in the southwest, and burrs, sage and other stuff probably account for a good portion of the cattle diet. Preparation also plays a role.Pork is a lot leaner then in years past as well. So I brine my pork and even brine my beef at times, if it is a traditional tough cut. The beef I get is a mix of grass fed, some corn and other grains. It works and works well. Tender, not over fatty, and good flavor.