The first apple you give to an eligible donkey each month, turns into a Harmony Pack for this donkey. Eligible donkeys are those that are at least 18 months old and have no special coat yet.
Its perks: Edit
Horseshoes: +50 horseshoes for the next Great Challenge (stacks with max. 5 horses)
Game: A Harmony Pack for the first donkey you give an apple to each month
VIP: Able to use Pandora's Box until 30 years old instead of 25 years old.