Bixby the animal

This is Linda's pet. You can't quite tell what it is, as its shape seems to be in a constant state of flux. A gigantic animal of some type. She is covered in blue feathers. She has 3 arms, 7 legs, 2 heads, 2 wings, and is shaking excitedly in the corner. She notices your gaze, and changes shape, just to amuse you.