So much for a quick project. This took way longer than I intended. I want to animate adding the apples. Now it just happens instantly. I should also probably make this a specific pony, rather than just the generic base I'm using here.
Space or click apple to add one.

Minor edit: She blinks now. My computer's pretty messed up but I'll try polishing this up.

Edit: Smoother belly; smiles on belly rubs; better belly calculation; less hardcoding;