It's only unreasonable to compare factory farming to human slavery if one believes that the rights of animals compared to humans is similar or worse than slaveholders believed the rights of their slaves to be compared to thme.

For the record I eat meat, but I'm under no illusions regarding the cruelty of the process. I support all laws that would increase farm animal welfare, even if it means my steak gets more expensive, it's simple enough to make good veggie dishes once in a while.