Grandin also views the meat industry as an overall positive for the animals in that it is the reason these animals get to experience life at all. She also points out that most ranchers and farmers are careful to give their meat animals decent lives (compared to animals in the wild, most of which either starve or are brutally killed or eaten by predators) because healthy animals bring the best prices.
My personal view on on animal cruelty is that it is bad not so much because of what it does to the animal (although that must be given due weight), but because of what it does to the human who engages in it. Cruelty coarsens and brutalizes the soul that belongs to God. From men, God loves and seeks kindness, not cruelty. So, the slaughter of food animals should be done humanely and without terrorizing or inflicting unnecessary pain on the animal even if that is not the practice followed by carnivores in the wild.