Marshmallow is a 1942 picture book by Clare Turlay Newberry.

One day his owner Ms. Tilly decides to bring home a baby rabbit, Marshmallow.

Over the course of time Oliver becomes angry and begins acting aggressively towards Marshmallow.

But one day, Oliver manages to open the door to the room where Marshmallow was.

In the end, Marshmallow is so happy and grateful that Ms. Tilly brought him home.