Containers Can Be Replaced

My hermitage is home to a cat and a mouse;
Both are furry creatures.
The cat is fat and sleeps in broad daylight;
The mouse is thin and scampers about in the dark.
The cat is blessed with talent,
Able to deftly catch living things for its meals.
The mouse is cursed,
Limited to sneaking bits and pieces of food.
A mouse can damage containers, it is true,
But containers can be replaced,
Not so living thing.
If you ask me which creature incurs more sin,
I'd say the cat!

---Ryokan---