Why is there no such allusion when killing pigs, when pigs bark and struggle, and when killing sheep?

Once upon a time, a sheep was killed and barked, but later it stopped barking because of one thing. After being slaughtered, pigs and sheep felt unconvinced and went to heaven to complain. For various reasons, the sheep didn't go with the pig to redress grievances, but the pig went first. After seeing the fairy in the sky, the pig asked, "Why do so many animals only kill me and sheep?" The fairy said, "You two are the same dish!" " "The pig felt wronged and shouted in front of the fairy, but he was driven out of heaven. After the pig left, the sheep thought they still had to go, so they hurried to the sky. I met a dejected pig on the road and asked him, "What did the sky say? "The pig sighed and said," People say that we were born as a dish! " "The sheep came back with the pig without saying a word. Later, the pig always felt that he had been wronged and died, so he shouted savagely; But the sheep felt that they had been killed and said nothing.