I: Gerbil's box

[LEENKNEGT-LIOEN]

Hi everyone,
Got something funny! I noticed my gerbils doing their needs always on
the same spot on their floor. So I put a kind of cat's box for gerbils
on that place, and they actually use! I'm really amazed, tht was the
last thing I thought they would do!
THANKS for reading! Has anyone else tried this before?
Sarah :)