"Generally accepted" isn't meaningful in this situation. Slavery is a good example of something that was (and is) generally accepted, but clearly wrong. It is not even generally accepted here today that it is wrong to be needlessly cruel and violent to animals. Whether or not people ACCEPT it, it is obviously wrong. It is morally wrong to cause a sentient being to suffer unnecessarily, especially for our own pleasure. Creating a creature does not give you the moral right to take its life or subject it to harmful conditions, and @Yezzey is exercising philosophical wishful thinking.