If you simply close the game sometimes the current state of the game is not saved when you exit.
Therefore we advise to always use the 'Save and Quit' button to exit the game!
If, for whatever reason, you do not wish to use the ‘Save and Quit’ button, we would advise before closing the game to:
1. Leave the pet in the house for 1 minute
2. Visit a friend and do an action (hug, kiss...)
3. Wait for 1 minute
4. Go back to house
5. Wait for 1 minute
To hopefully ensure the game saves properly!