It is curious to note that if you very slowly and gradually reduce the size of the sheep pen, as long as the sheep are still fed, they won't notice until they a

It is curious to note that if you very slowly and gradually reduce the size of the sheep pen, as long as the sheep are still fed, they won't notice until they are driven down the tunnel to the slaughter house. It is not until they hear the captive bolt being shot through the skull of the sheep in front of them, that they finally start to panic.