When I was playing Minecraft with my sister we saw goats. So i told her to walk over there and she did. I changed her game mode to survival but the goats didn't hit her. I hit a goat and he just ran around like a cow when one gets hit. Never did a goat look like it was going to head butt me off the cliff. and yes there was a big cliff. I think this is an issue because in the Mojang update video the players kept getting hit by goats. So i would think I could get hit by one. The goats were naturally spawned too. I am playing Minecraft vanilla. My game was not modified in any way.