No they don't

In the uk all the prices on goods are just suggestions and the price they ask for at the till is what you have to pay. At least that's what it was like a few years ago.

Of course a lot of shops do honour mis-pricings on shelves, but that is their policy to make you trust the prices you see.

Carnassial teeth

To the "anon coward" above, who clearly didn't look that far into wikipedia about carnassial teeth:

"The word "carnivore" sometimes refers to the mammalian Order Carnivora, but this is misleading. Although many Carnivora fit the first definition of being exclusively meat eaters, not all do. For example, bears are members of Carnivora that are not carnivores in the dietary sense, and pandas are almost exclusively herbivorous. Likewise, some full-time (dolphins, shrews) and part-time (humans, pigs) predatory species among mammals, let alone all carnivorous non-mammals, are not members of Carnivora." (Carnassials are the defining characteristic of the Carnivora order)

I'm hungry...