Texas Criollo Beef. Warren Ranch produces 100% grass-fed, pasture raised Criollo beef under our brand “Texas Criollo Beef.” Criollo are superbly adapted for the environments of the North American southwest. Renowned for their hardiness, fertility, gentle nature and longevity, the animals themselves can reduce the beef industry’s environmental impact. Our cattle spend their entire lives roaming spacious pastures in Central Texas. We use no hormones or antibiotics.