The earliest WinClan medicine cat mentioned was Mothflight. She was the very first medicine cat, the one who discovered the Moonstone and brought the knowledge of it back to the clans.
According to the book Secrets of the Clans, ThunderClan's original (first) medicine cat was Cloudspots.
the medicine cat takes their apprentice to the moon pool, they ask starclan to accept this medicine cat.
This is Thunderclan onlyPinestarStonepeltStormtailAdderfangGoosefeather(medicine cat)Featherwhisker(medicine cat)TawnyspotsSparrowpeltSmallearSunfall/starThrushpeltRobinwingFuzzypeltWindflightSpeckletailDapplepawWhite-eyeSnowfurBluefurLeopardfootPatchpeltRosetailGoldenflowerLionheartThistleclawTigerclawWhitestormBrindlefaceFrostfurSpottedleaf (medicine cat)
If a medicine cat dies and there is no apprentice, the Clan leader can choose a cat to train as the new medicine cat. They can select any cat within the Clan to become the new medicine cat, typically a young cat with an interest in herbs and healing. Once chosen, this new medicine cat apprentice will begin their training with guidance from StarClan and any remaining knowledge of the previous medicine cat.
the medicine cat is barkface and his apprentice kestrelpaw
Human medicine for humans, cat medicine for cats
No, you cannot use human medicine for your cat. It could possibly kill your cat if you do.
Leafpool was medicine cat when he and his brother and sister was born.
Medicine cat apprentices go to the Moonstone to receive their full medicine cat powers and to connect with StarClan for guidance and wisdom. It is a sacred place where they communicate with their ancestors and receive visions.
SkyClan's medicine cat before Echosong was Fawnstep.
No, Featherwhisker is medicine cat before Spottedleaf
A medicine cat should be at least 12 moons old when appointed the official medicine cat of a clan, but an apprentice can be 6-12 moons. Hope this helps!