My habitat is round with a diameter of 1m and a height of 10cm.

The rats will be trained on Earth not to defecate or urinate in the dormitorios only in the bathroom area. After relieving themselves they will pass past the brush and carbon to clean themselves off.

The habitat will be made of transparent plexiglass with screen on the inside for them to hold onto. The bathroom area will have screen floor for wastes to pass through into waste tray below. The fans make sure that the wastes pass down into storage tray.

You put the animals in the habitat from the top with a glove box as in your pictures. In the dormitory area the screen will move to allow for easy entry. The lights and fans are powered by bateries.

Thank you for your comments.