[Doom2pro]

The reason all the cows died is because of this:

1: If you notice, you will see that the "Wires" that are made of metal, Do not actually touch the ground.

2: Cows do stick there head through the fence, because nature tells them to flee Thunderstorms.

3: Cows are moist, salty Objects (Salt with Water conducts electricty)

As you can see, The Cows are "Big Moist Objects", Touching the part of the fence that is made of Metal, witch is long.

So, The best possible way to tell what happned might be this:

The Lighting struck:

1: the Metal Part of the fence, real close to the cows
2: one of the Cows touching the Metal Part of the fence

Sence Lightning wants to get to the ground, one might rule out a Far away (Not near cows) strike to the Fence, because it would have hit the fence, and jumped straight to the ground before it hit anything.

However if it was close to the cows, it would have travled down the "Wires" Into the Cows "Moist and Salty" bodies, Through there Moist feet, Into the Ground, Going through the Heart of the cow on the way down, thus Killing the cow(s).

So One might say, something gave the the Lighting a Nice tasty Shortcut to the ground, Like a nice "Moist Salty Bovine" Connecting, A: The Wire, to B: the Ground.

Think of it like this, You got one big Huge Outlet & Wire, You Take one end of the Wire and Connect it to a Long Wire (Fence), you take the other end and connect it to a Big Metal Plate (Ground), you Place the Cows on the Metal Plate, make them All touch the Wire, and then you Plug the Wire in the Outlet, and...

Beef it's whats for Dinner.

Although, this could have happened another way... Perhaps the Fence was an Electric Fence? a Suicide Group? Or what if one of the local Rednects Bent over, and his Rear was Exposed, causing the Horrified cows to Charge the fence.

Who knows?