Aesop on BushCo
The Cat and the Cock
A cat who had caught a cock wanted to give a plausible reason for devouring it. So she accused it of annoying people by crowing at night and disturbing their sleep.
The cock defended himself by saying that he did it to be helpful. For, if he woke people up, it was to summon them to their accustomed work.
Then the cat produced another grievance and accused the cock of insulting Nature by his relationship with his mother and sister.
The cock replied that in this also he was serving his master's interests, since it was thanks to this that the chicken laid lots of eggs.
'Ah well!' cried the cat, 'I'm not going to go without food just because you can produce a lot of justification!' And she ate the cock.
This fable shows that someone with a wicked nature who is determined to do wrong, when he cannot do so in the guise of a good man, does his evil deeds openly.
Aesop, The Complete Fables