Hi Nicole,
Thank you for your review. You are correct, the Micro-sized Highchair is too large for the baby mice or bunnies. We suggest the My-sized Highchairs for the babies since Micro-size better fits the micro bunnies and rabbits, as well as Big and Little Sister and Brother Mice. If you have any additional questions or concerns, please feel free to contact us at Support@mailegusa.com.
Kind regards,
Maileg Customer Support