Plants are sentient. Just type it into youtube and you can find many scientists giving talks on it.
Either way, plant agriculture kills more animals. How many cows does it take to feed one person? One cow for example can feed one person for 2 years or feed easily 600 people for a day.
But how many insects, rodents, reptiles, and micro organisms die from being poisoned by pesticides from coming into contact with just one corn or soy plant? Hundreds? Thousands?... Billions or even trillionsif you count micro organism.
So a cow only diet would only kill one animal per year whereas a corn only diet would kill, if we are being extremely conservative, thousands of animals a year.