Hay Day Dairy is a Hay Day production building first unlocked at the beginning of the Hay Day, the farm level 6. It costs players 50 Hay Day coins in Hay Day Store.
Hay Day Dairy can be used to dairy products like cream, cheese, butter, and goat cheese. At first, it has 2 slots to make dairy products. It can be added more slots by Hay Day diamonds when necessary.
There is a mastery system on Hay Day dairy from the farm level 15 onwards to boost the game. The more hours players crafts items using dairy, the more stars of the mastery system players can earn.
If you are lower than 15, you won’t see the mastery system icon near your production buildings.
40 hours of dairy use earn one star, which can make all bakery goods worth an increase of the price by 10% from truck orders.
120 hours earn the second star, which can make all bakery goods worth an increase of the experience points by 10% from truck orders.
360 hours reward the third star, which can produce all bakery goods 15% faster.
A tip to speed up mastery: never let it stop, and fill the slots with the longest items to be crafted when left.
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