When you catch a live squirrel and then drop it near a wild one, the second eats the one you dropped and crashes the game.
Don't know if they are supposed to eat eatch other, but since they work as an item once caught I get why it happens. Probably they will eat dropped birds as well.
Steps to Reproduce
Catch a live squirrel, drop it near a wild one
This issue has not been confirmed by a developer yet.