There can only be a cause to this - degeneration of the minds in today's world, and the increase in self-cherishing minds. The suffering of animals just to please the tastebud for the moment is extremely unnecessary and the food will eventually be passed out anyways.
It is extremely unnecessary to put the poor animal through so much suffering. What is the difference between them and you? They have feelings, they obviously can feel pain, they have a conscious, they cry, they have eyes, they are ALIVE, just like you! Physically, and categorically, we differ (in species), but definitely they are no different that all they want to do is just to live their lives. Humans are cruel, abusing their power to show their superiority by making other beings suffer. What a shame.