Cattle mutilation (also known as bovine excision is the apparent killing and then mutilation of cattle under unusual or anomalous circumstances. Sheep and horses have allegedly been mutilated under similar circumstances.
A hallmark of these incidents is the surgical nature of the mutilation, and unexplained phenomena such as the complete draining of the animal's blood, loss of internal organs with no obvious point of entry, and surgically precise removal of the reproductive organs and anal coring.
Another reported event is that the animal is found dumped in an area where there are no marks or tracks leading to or from the carcass, even when it is found in soft ground or mud. The surgical-type wounds tend to be cauterized by an intense heat and made by very sharp/precise instruments, with no bleeding evident. Often flesh will be removed to the bone in an exact manner, consistent across cases, such as removal of flesh from around the jaw exposing the mandible.
Since the time that reports of purported animal mutilations began, the causes have been attributed variously to natural decomposition, normal predators, cryptid predators (like the Chupacabra), extraterrestrials, UFO's, secretive governmental or military agencies, and cults.