Lizzie 5 It turns out (to my disgust) that what I thought was mouse poop was actually cockroach poop. I didn’t have to use the cage because I didn’t have a mouse lolHowever... it is really good quality and would have been perfect for me if I were trying to humanely remove a mouse from my house. Instead I had a cockroach the size of a mouse which can only mean I need to burn my house down and move to another country.