Animal Axes are an UNCOMMON type of Axe that can be purchased from Jake for 1,000 coins when the associated animal is brought to him.
Each Axe increases drops from their associated animal by two. This doesn't affect non-stackable items.
Trivia[]
The axes are effectively equivalent to Looting XX if such a level were to exist, but limited to common drops on their respective mobs, and with the difference that for affected drops below 100% chance (such as Eggs), it is still the drop amount that is increased, not the drop chance.