Seasonal Gift Boxes were implemented on August 28, 2015. Users would obtain one for every 500 foals or eggs they click per day, including self-owned horses. These boxes may contain (at random) food, trinkets, the monthly Ethercorn color, or exclusive eggs and adult horses. Even if all foaling stalls are closed, the egg(s) can be received. Each box has a different selection of possible horses, and the box obtained depends on the current in-game season.
These items were retired in October 2017 as part of that month's daycare update. Existing boxes can still be opened to obtain their prizes.