Our older cows are a simmental/limosin cross which is a large frame breed that is many years out of "style" for grazing, but they're hardy old cows and raise a big strong calf, so we have a few still around. We've been gradually replacing them with smaller frame Angus and gelbviegh.
Being in Missouri, our pastures are mostly fescue (the blessing and curse of fescue is a topic for it's own dedicated note). I've overseeded many of the pastures with annual lespedeza, and have a couple paddocks of red river crabgrass.