I was asked by my uncle after school one day if I had noticed a dead cow. I replied "yes, I saw the cow away from the rest of the herd, but it was alive when I saw it why? He said the only tracks near the cow were mine and it had no blood with certain organs surgically removed by something other than a knife. I never told him about the telepathic comunication that occured shortly after stumbling on the stray cow. I did think it strange that one cow would be away from the herd, but stranger was the voice inside my head that told me to think my thoughts. It was stranger still how calm I felt at that moment not even noticing the cold wind that drove me back home from hunting. I would never have shown myself to an armed earth creature were I an alien. I will always remember the conversation had that day, needless to say it was a life changing experience.

and or early 90s, a local sheriff found a dead cow and watched it, hoping to find the culprit; alien human or other, it ended up to be other; blow flies cut with razor percision and the blood dries up or is consumed by the flies, same with the tongue and eyes.

Hmm! tell that to the rancher in Colorado!
I'm sure he would appreciate it.
The new syfy show went to invesigate it.