Cow

The Cow is a special agent. It attacks any Bloons with green in them by trying to eat them. This does 3 damage, and slows the Bloon by 95% while eating it. (It takes 5 seconds to eat a layer) It can move anywhere on the screen, but will only target Bloons in the range of a dart monkey. If it crosses the track at any time, any Bloons that run into it will be stunned for 0.8 seconds and pop by one layer. It costs 30 MM.

Pro
Pro Upgrade - Colorblind cow!

The pro is unlocked after 50 uses. The cow is now colorblind, allowing it to attack all Bloon types.

Epic
Epic Upgrade - Staving cow!

The epic version is unlocked after another 80 uses. The cow is now starved, and will eat any Bloon in sight. It now runs at the speed of a green Bloon, and will now eat off five layers of Bloon!