Fawn

The Fawn is the last temporary form Ozma's magic gave Polychrome before her enchantment finally broke.

First named in The Tin Woodman of Oz, ch. 13

She transformed the Canary into a Dove, and then transformed the Dove into a Speckled Hen, and then changed the Speckled Hen into a rabbit, and then the rabbit into a Fawn.