Minecraft wiki entry for Development_versions, associated text: Axolotls, Bees, Boats, Cats, Dolphins, Glow Squids, Goats, Hoglins, Iron Golems, Ocelots, Pandas, Parrots, Pigs, Polar Bears, Squids, Striders, Wolves, and Zoglins can now have Balloons attached to them.