Grumble the Grubby Goat

From Harry Potter Wiki

Grumble the Grubby Goat is a story told to wizarding children. It was Aberforth Dumbledore's favourite tale, which deals with a goat that attracts flies. Aberforth and his brother, Albus, would get into frequent arguments regarding reading this tale at bedtime, with Albus' favourite tale which is The Tale of the Three Brothers. ^[1]

It was mentioned but not published in The Tales of Beedle the Bard.

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