Billions of animals are killed wherever crops are grown.
Even if you are entirely vegan, animals have to die if you want to eat.
In fact, if your food is grown on a farm then you are probably contributing to more animal deaths than someone who obtains food from hunting or fishing.
Billions of invertebrates and other small animals are killed during tilling before planting, with pest/weed control during the growing season (even with "organic" or "natural" compounds), and of course during harvest.
This is inevitable, farming requires controlling soil and plants, and this will inevitably kill animals that you don't even see. Do you really think you can flood a rice paddy without killing countless mesofauna?
Fishing/hunting also kills animals, but you can catch a fish or hunt a deer without restructuring an entire ecosystem. Which means you can feed yourself without killing quite so many animals.