What are the secret hats and room items?
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Besides the hats and room items that open up with your streak, every tab but Window and Sign has secret ones. Until you find one, it shows only as a dark shadow with a question mark and ??? for its name, and tapping it says only that it's a surprise. Each secret opens up on its own milestone as you keep going in the ministry and care for your pet; which one is part of the surprise. None depend on hours, none need a buddy, and none can be missed for good, so you can find any of them later. The first time you see one after it opens up, it says New; then pick it like any other item. Secrets you've found stay open, sync with your pet like other items, and come back from a backup. If a secret you expected hasn't shown up, open your pet's details again after your records sync; secrets are worked out on each device from what's stored there.