Note, that those slaughterhouse are usually on smaller scales, than what is considered factory-farming. Slaughtering is just a small part of the suffering anyways and cruelty does not strictly depend on scale. Where I’m from, southern Germany, last time I looked, half of the milk farmers tether their cows, affecting a quarter of the cows in that region. Those are your neighbourhood family-owned farms.
The easiest way to not support any of that cruelty to animals, is to avoid animal based products.
There is no shortage of videos of how that quick jolt of electricity fails. Here are some examples: https://youtu.be/LQRAfJyEsko?t=979
Note, that those slaughterhouse are usually on smaller scales, than what is considered factory-farming. Slaughtering is just a small part of the suffering anyways and cruelty does not strictly depend on scale. Where I’m from, southern Germany, last time I looked, half of the milk farmers tether their cows, affecting a quarter of the cows in that region. Those are your neighbourhood family-owned farms.
The easiest way to not support any of that cruelty to animals, is to avoid animal based products.