Treat Mastery unlocks at XP Level 10.
Now it will cost to feed your animals but you will earn more when collecting hearts.
Pay out will be linked to the colour of your hearts and you will still get xp according to
the level you are on and the colour of your hearts.
Red pays more, pink a little less and purple do not pay out.
Treat Mastery Rewards
XP amounts remain the same. Costs and rewards are Zoo Dollars.