She just might not realize what the wheel is for. You might try putting her on the wheel, then put your hand against it to block her from getting off. She may try taking a few steps and figure it out. If she likes mealworms, you could also bribe her with one to try taking a few steps forward to show her, too.
Plus, if she's doing more running around on the floor, she might just think it's more interesting to explore the portion of the room she's in, rather than run on her wheel.
Plus, if she's doing more running around on the floor, she might just think it's more interesting to explore the portion of the room she's in, rather than run on her wheel.
