It may take less than an ounce of sweet milk chocolate to kill a rabbit, depending on its size. Yet the woman in the parking lot feeds it to her overheated rabbit in the form of a fudge sickle saying how it loves chocolate, the very thing that could kill it! Maybe this information wasn't known back then.
After being rescued, the woman offers her rabbit a fudgesicle to cool down in the McDonald's parking lot. McDonald's doesn't offer fudgesicles on its menu.