Historical clue formulations

• Pet that stores food in cheek pouches — 2025-12-08
• ___ wheel — 2022-06-11
• One with a squeaky wheel? — 2019-04-23
• Pet with cheek pouches — 2010-01-04
• Cage-wheel runner — 2004-02-25
• Treadmill user — 2000-03-23
• Treadwheel operator — 1997-01-04
• Caged pet — 1996-09-26