The two male cats were let out into their glass enclosure for the first time recently at the Tobu Zoo in 2005 . However , curiosity soon got the better of the cats and one accidentally fell into the swimming pool . His brothers quickly rushed to the toilet after realizing he was in trouble .
The quadruplet male cubs were let out into their glass cages for the first time recently at the Tobu Zoo in Tokyo . However , curiosity soon got the better of the cats and one accidentally fell into the play pool . His brothers quickly came to the rescue after noticing he was in trouble .