confined animals escape

Put the summary of the bug you're having here

What I expected to happen was make a farm
capture animals

What actually happened was make a farm
animals escape during the night or when I go down to look for minerals

Steps to Reproduce:
1. captures a group of animals in a room
2. waiting for night, go to look minerals or waits for 2 days
3. go see the animals, they aren´t longer, the are out of de room