There's an animation in my list that's still greyed out. I have unlocked everything except this animation. What am I missing?
That action is one of the special things a bunny will do when your bond is strong enough. You can raise your bond level by calling them from your contacts, giving them treats, and petting them lots.
Once you’ve gotten close enough, try moving your cursor (your hand) near them and see what happens. Hopefully you’ll get your chance before long!