The Humans
I felt more sympathy for the humans performing the same tasks over and over and over again than I did for the animals.
Well, I did feel some empathy for the animals. I believe they do feel fear. I just learned about Temple Grandin, who is an autistic woman with a rare gift of empathising with cows. She has a special ability to communicate with them. Many many large corporations hire her to help design systems for cattle farms that minimize the stress cows feel.
I believe that humans are carnivores and are designed to need and eat meat. I totally respect vegans and vegetarians, but I am not one.
But anyway, I wondered what the people thought about all day while they were performing their solitary repetitive acts. I thought the people working with the plants in the greenhouses and fields were somehow better off than the meat processing employees. I just cannot imagine lasting at a job like that.