Kommentar zu Tehillim 145:8

[Adonai] is good to all. He is good and merciful even to wild animals, domesticated animals, and fowl. And so it is fitting for a person to follow these ways of His. One should not destroy life other than for a need or to guard oneself from dangers. So we find that our Holy Master (Rabbi Judah the Prince, editor of the Mishnah) bade his handmaiden not to sweep up mice with household embers. Rather, she should let them live in the cellar. He said to her, "It is written, 'His mercy is upon all His works.'"