I lived in Montana about 10 yrs ago while a fly fishing guide, we had a stable of horses that we used for ride in trips to some high mountain lakes.
One morning we found blood at the water trough and a trail heading into the pasture to a dying horse. It was lying on it's side bleeding to death from some deep gashes on it's neck top and underside as well as a bad one on the underside of it's left back leg that hit a large blood vessel.
He had just enough strength to get up and into a trailer and off to the local vet.
He got the bleeding stopped and I don't remember exactly how many sticthes but I seem to remember something like 600 head to toe.
Vet said that most likely it was a Mt. Lion attack, what else could it be?.........well a walk back into the pasture to find evidence of a cat showed our "Mt. Lion" was actually a length of 3 strand barbed wire fence that apparently the horse got into in a panic during a thunderstorm the previous night.
This "Cat" attack happened in areas with actual real life Mt. Lions and was determined to be a cat attack by a Montana veterinarian........and it was nothing more than a sharp fence and struggling horse. (A Mt. Lion sure would have been the sexier of the 2 though )
This isn't 2nd hand experience.........I cared for the that horse's wounds for weeks after the fence attack.

We have pages uponPAGES of actual hunters/ sportsmen on this very site who can't tell the difference between a Bobcat and a Mt. Lion from a clear trail cam picture that they can study for as long as their hearts desire.......yet we are to believe 2nd and 3rd hand "Eye Witness" testimony from people who wouldn't know a Mt. Lion if it had them by the throat?

You guys are telling me that someone has "Confirmed" that a Mt. Lion in the Williamsport area is attacking horses and killing shepard pups and this isn't BIG TIME news?
You have an Alligator attack in Florida where they are a dime a dozen making national news but a Mt. Lion in PA attacking anything that moves wouldn't even make the local newspaper?

Until someone can show actual first hand DNA type evidence or a clear picture of a Mt. Lion on a horses back next to the Rt220 highway sign on a first hand basis I'm breaking out the tin foil hat yet again.