From the origins of time obtaining food was like obtaining fuel for the engine of life.
All species had to face this first challenge on an almost daily basis and they used a whole array of curious strategies. Sharpened, powerful weapons, deadly poisons, perfect camouflage, etc., a complete biological arsenal at the disposal of the species.
It was, and still is, an arms race. New acquisitions allowed them to be more competitive when it came to looking for food or avoiding being eaten and the penalty for falling behind was death.