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|Guinea fowl to guinea pig|
Transforms a guinea fowl into a guinea pig
- "The guinea-fowl they had been changing into guinea-pigs had been shut away in a large cage on Professor McGonagall's desk (Neville's still had feathers)..."
- —After a class on this spell.[src]
Guinea fowl to guinea pig is a Transforming spell that is covered in fourth year Transfiguration classes at Hogwarts School of Witchcraft and Wizardry. It is noted that Neville Longbottom was not particularly skilled with these spells.
- Harry Potter and the Goblet of Fire (First appearance)
|Professors: Albus Dumbledore · Minerva McGonagall|
|Textbooks: A Beginner's Guide to Transfiguration · Intermediate Transfiguration · A Guide to Advanced Transfiguration|
|Known practitioners: Emeric Switch · Circe · Falco Aesalon · Mirabella Plunkett · Thaddeus Thurkell ·|
|Transfiguration spells studied at Hogwarts: Chair to cat · Match to needle · Snail to Teapot · Teacup to Rat · Switching Spell · Transforming Spell · Avifors Spell · Mice to Snuffboxes · Beetle Buttons · Rabbit Slippers · Vera Verto · Teapot to tortoise · Draconifors Spell · Lapifors Spell · Vanishing Spell · Owl to opera glasses · Guinea fowl to guinea pig · Hedgehog to pincushion · Small Child to Rat · Meddling Man to Monkey · Crinus Muto|
|Branches of Transfiguration: Transformation · Vanishment · Conjuration · Untransfiguration|