re SeanC: Sneaky Sean, always having some cat food to lure unexpecting kittens into his house ..

Nah, so the cat chose you to adore, serve and protect her, just like in those old treaties between cats and men going back to Egypt
Cats often have gaseous problems when there is a food change, so i would wait a week and
see smell whether there are changes to a less olfactorian overall impression.