Livestock mutilations (cattle, goats, sheep, pigs) are being carried out covertly to avoid attracting attention to their activities. There is a great deal of sophistication required for the process of extraction of organs. It is necessary to lift targeted animals from their initial locations into a craft in which they are mutilated and then redeposited near the original site of extraction. Usually, these operations must also take place at night to avoid arousing suspcion. Immobilizing and hoisting an animal that weighs a ton or more without causing any disturbance is a particularly daunting task.
The captured animal must first be drained of blood before their internal organs can be obtained. While the best method of extracting soft tissue is unclear, some kind of device must inserted to first liquefy the internal organs. This method would be consistent with several biopsy observations noted by law enforcement stating that both the heart and liver in a mutilated animal are found to have the consistency of soft peanut butter.
The purpose of these mutilations are somewhat beyond comprehension, though several researchers believe that they are being used to detect the spread of prion disease in mammals. The organs taken from mutilated animals are very similar, if not identical, to the soft tissue traditionally used to detect the presence of prions. Considering that there have been several high-profile cases of prion diseases spreading from livestock to humans, prions in livestock are of particular interest.
It has additionally been suggested that prion diseases were introduced as a way of conveniently ending the human species after its purpose has been fulfilled. Of course, further research is necessary.