Could be a groundhog/woodchuck(s)
Woodchucks
Woodchucks are messy eaters that often trample the tomato plant in the process of eating the tomatoes. Although woodchucks prefer peas, beans and corn, they often dine on tomatoes, broccoli, cabbage and other tender vegetables. Woodchucks are difficult to control because they live in burrows with mounds at the entrance of the holes. A 3-foot fence may keep woodchucks out of your tomatoes, but the fence must be buried several inches deep, and then bent underground at a right angle facing away from the garden to keep woodchucks from digging under. Electric fences, consisting of one strand at 4 inches and another at about 9 inches, may keep woodchucks from destroying your tomato plants.