The Companions help you defeat Rancid's evil schemes and progress through the game. Every Companion has a special ability which will help you to beat the level.
There are lots of Companions that can be collected, with the last Companions being awarded on level 1110. They form the Farm Club, and you can view your Farm Club Companions at any time by tapping the Barn icon at the bottom of the map screen.
'Companion Reward' levels are marked on the game map with a green button marker showing a friendly cow's face. Aim to get 3 stars on those levels, to win the most powerful Companion. You must also be connected to the Internet for them to be added to your Farm Club account.
To activate a Companion, choose one on the pre-game screen and pay with your Magic Beans. The Companion will act as a continuous booster, giving you a great advantage on those tricky levels. Think carefully about which one to use to ensure you maximize their abilities for that level!
If you don't want to use a Companion during a level, then simply un-tick the Companion box before starting and no Companion will be activated.