We are currently modeling new mobs that are similar to the march-hare but for other animals.
As for bunny/crickets. I'd rather see the bug/cricket get toned down, as nobody fully expects for a cricket to knock them unconscious. Once a player can then successfully kill something, I'm then a lot more inclined to ramp up bunnies just a tad so they can still get that "holy crap this game is hard" early experience. My reason for wanting crickets as the entry-level critter is also because they have the smaller reward. A bunny provides meat, skins, etc, whereas, a cricket is very limited in what he unlocks by comparison.