Jainism, their core tenet of Ahimsa (non-violence) applies to literally every lifeform, even plants and bacteria. Jain monks that take this to the letter make your standard vegan look like a hypocrite - they cannot even eat roots, as that would kill the plant it comes from. They also must take extreme care not to accidentally harm any lifeform, so they have to take measures such as turning off all fire during the night so that insects don’t accidentally burn themselves in them, or brush the soil they’ll walk on to avoid stepping on an animal by accident.