[valkyry1]

I’m thinking its other animals on them.

[pandoraou812]

Strange

[heartwood]

Vultures? If the animals were dead or dying already. Black vultures will attack living newborn calves, but these were six moonths old or so, pretty big.

[Windflier]

I’m thinking its other animals on them.

This rancher has been raising cattle for 50 years. Don't you think he would recognize normal predation if he saw it?

From the article:

"...he's found four calves dead in a way that he cannot reconcile with anything in his 50 years of raising cattle: eyes and ears missing, tongues and genitals excised in what appeared to be a series of fine cuts.

Mountain lions, bears or coyotes would leave messier marks, he said. And Sanchez found no tire tracks or footprints that would suggest a human invader -- nor even bloodstains he'd expect to find around the carcasses if someone had butchered them."

I'm not advancing any theories as to who or what did this, but it's definitely not four-legged critters chowing down.