Not true, live stock feed is mostly the husks and stalks of the plants that are inedible to humans, which if it weren't for livestock, would be discarded as waste. See this video for some more common misconceptions, if you're interested: https://www.youtube.com/watch?v=sGG-A80Tl5g

Every plot of land used to grow crop represents countless animals that used to live there, and were wiped out by the farmer. Farmers constantly battle against pests, which too are animals, just trying to live. Vultures are often seen following combine harvesters, to prey on the corpses of field mice and other small mammals that get caught in the blades. Zero harm is a myth.