Parasitism. Evolve into an ecological niche where your prey has no defence against you, and suck nutrients from the prey, up to a maximal level where you don't

Parasitism. Evolve into an ecological niche where your prey has no defence against you, and suck nutrients from the prey, up to a maximal level where you don't quote kill it outright. We treat parasite infections with toxic chemicals. 50,000 litres of permethrin into the dwellings of the founders of this cooler door startup should be effective. Make sure you get all the larvae.