"Sheep and goats usually exhibit different behavior. Goats are naturally curious and independent, while sheep tend to be more distant and aloof. Sheep have a stronger flocking instinct and become very agitated if they are separated from the rest of the flock. It is easier to keep sheep inside a fence than goats. Sheep are easier to handle than goats.
Goats will seek shelter more readily than sheep. Neither species likes to get its feet wet and both prefer upland grazing to lowland. In a fight, a ram will back up and charge to butt heads. A goat will rear up on his hind legs and come down forceably to butt heads. During controntation, such fighting behavior favors the ram." from
Sheep 101
Scriptures tend to be a little bit harsh when it comes to punishments and it's possible the whole "didn't regret anything but would probably do it differently" had some impact there. Like, she did a good thing but from what we've seen of hell you don't get into heaven unless you've been either consistently good or legitimately remorseful.