I wanna say it's just because it's an early version, because of how the goat just disappears, but I feel like the Ceratosaurus approaching the goat was all intentional because it was fully animated and when it roared behind the goat, causing its tail to flutter before it ate it whole, it seems like that was for comedic effect. It got a chuckle out of me the first time, but if that's how Ceratosaurus is going to eat goats, I don't think I'll use goats to feet it.
Who knows though. The version at the event could have been a pretty old build of the game, because a lot of the AI seemed rather clunky, and again, the goat just disappeared. There was no animation of it being eaten whole.