A perfectly reasonable explenation for cattle mutilation
The surgical like precision that people claim they see was not an animal attack...Now what's doing it I don't know.
This, in all honesty I think SOME cases MAY be down to animal attacks but these are normally really easy to identify.
As @noteverythingisalien has said, some of these mutilations are done with surgical precision, only certain parts of the animal have been removed and there's no evidence that an animal has eaten parts of the carcass.
I think there's more to it and I don't think animals are always responsible.
Wisdom is knowing how little we truly know.
The mid 70's saw the FBI brought in to investigate these things...The below link takes you to that report:
Also over on Mysterious Universe you can read an article by Nick Redfern on how the FBI got involved:
Cattle Mutilations and the History Behind Them: