There is a piece of property on the Sachse/Wylie border called Muddy Creek Preserve that has a few larger cats living on it. I have seen the tracks on a freind property that backs up to the preserve. One of his neigboors lost a calf to a larger cat last year. We still here packs of wild dogs/coyotes up there also. The perserve backs up to the landfill up there so there is plenty of food.