Shapeshifting is the ability to change its shape into that of another person, creature, or other entity or finds its shape involuntarily changed by someone else.
Tommy shifting into a dog.
The Alpha Shapeshifter shapeshifting from Sam to Dean without the need to molt like his children.
Wendy turns from a cat to herself
Penelope uses this power to shift into other people
Sam shifting from a dog to himself
Call me shifting from a dog to a eagle