It's very personal, but for me "it could reasonnably be useful for humans" (ie it's not cruelty for fun) and "they are not humans" makes it okay to do this to p

It's very personal, but for me "it could reasonnably be useful for humans" (ie it's not cruelty for fun) and "they are not humans" makes it okay to do this to pigs. So yeah, dogs/dolphin/elephants/monkeys would be okay too. But I do appreciate that other people might have different sensibility or empathy with animals