A zoomorphism dream indicates that you want to return to nature to feel more freedom and that it bothers you to live in such a hurry. You can express independence and find a new hobby. On the other hand, it can suggest that your main desires and sexual impulses have come to the surface.
Dream dictionary: Zoomorphism dream meanings
In the dream you became an animal, this dream shows that you follow your instincts, you desire to forget civilization and to act wildly and extremely crazy in your life. You want to express your independence with such a wild behavior. Also this dream may show your primal sexual desires, you want a wild and noncommittal relation or sex. But it is really important what kind of animal you became.