This[1] says humans make up 34% of mammal biomass, 64% is livestock, and 4% wild animals. Another stat[2] says we kill more than 63 billion chickens each year. I like my steak and fried chicken, but damn if it's not horrific. (Imagine if an alien race farmed and killed 60 billion humans, each year...)

1) https://ourworldindata.org/wild-mammals-birds-biomass 2) https://birdvenue.com/homegrown-flock/chickens/how-many-chic...