In the dark, that would scare anyone.

That would scare the shit out of me!

The main give away though is the cow calmly lying down only a few yards away from the "tiger" - close to foaling my mares would not allow our dogs or cats in their foaling pasture.

The mares would run down canines - I once watched a fox almost get stomped by my mares. I also had a mare run OVER me to go after our dog that she was normally friendly with. I also had a cat attacked by a mare with a new born foal - she picked the poor cat up and threw it about thirty feet. (The cat had no broken bones, but showed up with a hernia from one hip to the other that had to be sewn up.)