had one pathetic tail feather, or that’s what she thought. So she went to the doctor to ask for pills to make her tail grow.
The waistband on the skirt actually folds to hide the snaps for adding tail feathers to the tail. Above you can see two of the three tabs for attaching the extra tail feathers.
Below the one pathetic tail feather hides a bag containing the tail that will “grow” when Gertrude takes the pills. The ribbon on the bag is untied by a sly actor and pulled away to reveal the long tail. The long tail is secured with two snaps. Later, when Gertrude returns to the doctor to ask him to remove the tail, he is able to “pluck” the feathers by un-snapping them.