Hey Petco, "New Lower Price" tags should not be put on items that are not the same as a previous item.  That's right, I consider the 33lb bag of dog food that is sitting in a shelf where I previously bought a 40lb bag of dog food to be a different product and you damn well better believe it should be at a lower price.  Fortunately for you, the price per lb still works out to be the same (I'd take less in that case if you're offering), or I'd be forced to wield the keyboard of a strongly worded letter *smirk*.  Americans really are idiots if they fall for this crap.