Above)
Butch, "la petite chihuahuate" from Paris, France,
disguises himself as a bunny without need of costume.
Pictures of Butch and Other Chihuahuas
Plus if you search "Butch" at that website,
you'll find lots more about him.

Below)
Chippy the Chihuahua in her bunny outfit.
She seems to be saying, "Do I look all right?
Are you sure I don't look stupid?
Well all right then, if you say so,
you know how much I trust you."