A lot of people down here use Bahia. It's hardy, chokes out most weeds and works well. I know people who have used it for 50 years for both horses and cattle.
One blessing or curse is that once it goes to seed it will spread. If it gets into your yard you'll just about have to dig it up by the roots (or just use it for your lawn
). For a pasture grass that makes it great. It's not low or excessively high in nutritional value. You can look it up on line. I know FL did a lot of studies on it and found it to be a good grass for grazing. I imagine it can be found I most Gulf coast states since SC and GA are loaded with it.
I see it when were riding along the roads since you can find it growing along a lot of highway shoulders (it really does spread once it comes to seed).
I even feed Bahia hay, but might have to find something with lower nutritional value since it's a lot of work keeping the weight down on my older mare who is a VERY easy keeper.