All I know is that my cats poops stink horribly too. With sixteen kitties, I try to buy the least expensive food that has Chicken listed as the first ingredient ... so I know it's good quality. As of late that has been Purina One. However, because of the caustic fumes that also come from our litterboxes, and what you have just experienced, I am thinking on saving my pennies for the real good stuff ... Science Diet all the way!

Kim