Animals are sometimes treated as friends but are also treated as enemies. We keep them as pets, but if it suits us, we slaughter them in their own habitats and in slaughterhouses. If we could kill them in a quick and pain-free way, like a special injection, which is not harmful to us, it would be a lot nicer to the animals being killed. However, the scenes in slaughterhouses are ones of bullying and torture. The people hurt the animals in the most horrific ways possible, for example, slitting their throats while they are still al ....