The British Hedgehog Preservation Society has won a years-long fight with McDonalds to shrink the size of the opening in a McFlurry (a frozen
edible-oil dairy slurry) reduced. The present wide-mouth McFlurry cups serve as fatal hedgehog traps by sucking in 'hogs who lick up the left-over slurry, get stuck, and die.
Up to now the opening in the container has been large enough for hedgehogs to get their heads into for a lick of the left-over dessert — a trap they have then been unable to withdraw from, so dying of starvation in untold numbers.
But from September 1, the wide-mouthed opening in the lid of the McFlurry containers will be reduced in size, making them too small for the sugar-loving animals to get their heads into.
Update: The McFlurry is dairy, not oil. Here's the ingredients (thanks, Matt!):
Vanilla Reduced Fat Ice Cream: Whole milk, sucrose, cream, nonfat milk solids, corn syrup solids, mono and diglycerides, guar gum, imitation vanilla flavor, carrageenan, cellulose gum, vitamin A palmitate. Contains milk ingredients. Mini M&M'S® Candies: Milk chocolate (sugar, chocolate, milk, cocoa butter, lactose, soy lecithin, salt, artificial flavors), sugar, less than 0.5%: coloring (includes yellow 5 lake, red 40 lake, blue 1 lake), cornstarch, corn syrup, dextrin. Contains milk and soybean ingredients. May contain peanuts.