litter box

I am a first time rat owner. Ive had my girls for about a month now. I have a couple of questions that Im hoping someone can answer for me. 1. This is the cage my rats are in They always pee on the third level of the cage and as a result my room always stinks. Even if I wipe that level down...

I recently got a litter box for my new rats. I did as the directions said, and waited until they pooped in that corner and then moved the litter box in with the litter. The box is far away from their food and water, but it's still pretty large. Should I be worried about them eating the litter? I...