Does she get out for some zoomies twice a day? Not sure how she can burn off excess energy in that small of an area, but we have only ever free roamed so it may be fine.
We purchased this 10" on amazon for Walter (4 month old Flemish Giant). We wake up every morning to him doing the 500 through (and over) it.
Bunny Hideout, Rabbit Tunnels and Tubes, 3 Pack of Grass Balls - Collapsible Hideaway