I placed a Piko on the shelf in the house that you can buy. After awhile I came back and took the Piko off and the game crashed. I don't know if this is because it starved and died while on the shelf or if entering and re entering the house had anything to do with it.
Steps to Reproduce
Put Piko on shelf, Wait a few days, remove Piko from shelf and the game should crash
This issue has not been confirmed by a developer yet.