'But you do not have to eat me',   said the mouse, from within the glass where he sat.

'Oh, but I do',  came the hissed reply,  'for quite simply, I'm a cat'.

'But I'm hardly a meal',  squeaked the timorous mouse.  'You could spare me and break nature's law'.

'Impossible',  purred the smiling cat, grasping the mouse with a paw. 

There's no moral to my  tale.  Although, to me, it illustrates that:  A man's gotta do what a man's gotta do.  And I guess that goes for felines, too.