Animal Transformation Potion

The ingredients of this potion are unknown, but it is used three times within the series. The first time it is used by Phoebe in the episode "House Call" to turn Spencer Ricks into a turkey. She uses it again in "Soul Survivor" to turn him into a pig. Piper also uses this potion in the episode "Rewitched" to turn nosy trespassers into rats.