ﬁsh. Well, why not? To a cat, if the meat is available, it is there to be eaten, even if you had intended to have it for your supper.
Essentially, no cat can be trusted if meat is within reach. Hence the old proverb about someone who is “honest as the cat when the meat is out of reach.” In other words, that person can be trusted only when there is nothing around to tempt him.