If you are indeed talking about Centipede grass, as is common throughout the southeast, it's a slower, low growing, fine leaved grass that makes a good lawn if wear and abuse aren't an issue. It doesn't put out enough forage, per square foot, to make it desireable as livestock forage. Native, or wild Bermuda grass will dominate it here in Louisiana, as will St. Augustine if allowed to grow to 4" or more. Roundup kills it very well, of course, but what's worse - the grass or the cure?