Killing an animal for food purposes can be justified. Because it is natural and we are not going against the nature. But how can you justify forcing animals to fight until their death, just for our entertainment? I am more or less neutral on this, because events such as bull-fighting are integral to some cultures. So it is not right to ban them. But at the same time, my personal opinion is against such sports.
What about circuses? Aren't animals tortured there for entertainment purposes only?
I'm against cruelty towards animals, but I bet those fighting roosters are much happier than the bear riding bicycle in the picture below.
[im g]https://i.imgur.com/Tg3BpPQ.jpg[/img]
No one is forcing those roosters to fight btw, it's in their nature. While in circuses animals are constantly tortured by tamers to perform those funny tricks crowd adores so much.
It is heart wrenching to see such pictures on the screen by the hands of the most civilized and wise specie proudly known as humans. We have laws and regulations that forbid this but I have not seen someone taking a strict action. Maybe this is what will happen to human if AI kept on advancing in the long run for over a century or so. A robot will know that he is a robot and would have the wisdom equal to a Monkey. Think about how one would feel to be played like this at the hands of AI once the intelligence reaches the point of singularity.