All the pix I saw on mutilations looked exactly like any cow that had been laying dead for a few days. Most of the ranchers in that area do not check their cattle all that frequently, too much area to cover. Good luck.
Getting to the animal right away is critical for proper assessment in terms of the more unique aspects of an authentic mutilation--I forget if it's within the first 20 minutes or first hour after--is necessary for positive, certain proper assignment of the case to an 'other' sort of mutilation.
1) The laser scaple precision aspect as well as some other details need that quickness for some reason. I forget specifics.
2) Predators will NOT get near an authentic case. Usually for many months to a year or longer afterward. They will give it a wide berth even if it's in their normal path.
3) Vets are usually necessary to make some of the more professional detailed analyses of some of the strange aspects.
4) BTW, as in the rest of the UFO stuff--we have some well known, popular FREEPERS who have had authentic mutilations on their farms and ranches.