Historical clue formulations

• Dog breed with a blue-black tongue — 2024-09-20
• Dog with wrinkly skin — 2020-03-05
• Wrinkly-faced Chinese dog — 2015-08-24
• Wrinkly-skinned dog — 2014-02-12
• Wrinkly dog — 2013-09-22
• Wrinkly-skinned dog — 2003-07-22
• Wrinkly-skinned dog — 2001-08-25