Heartless teenager steals and kills pet parrot.

It is terrible how inhumane some people can be. Sometimes, we might need to kill an animal in order to protect ourself, or a family member, such as if a dog attacked a person; but to just choose to ruthlessly kill an animal is a terrible thing, and shows a definitely disturbed brain on the part of the killer.
Even chickens are very intelligent, although not as smart as parrots; but they are able to understand a lot more than people give them credit for.

Even worse than the mentally disturbed person who kills an animal, in my opinion, are the people who use dogs for pit-fighting, knowing that the dogs will tear each other to shreds.
With these people, it is not that they are on drugs or mentally unbalanced for some reason, they do it for the money and the pleasure at watching the dogs kill each other. They don't just do it once, they do it all of the time.
These dog-fighters steal people's pets to use as "bait dogs" to train their fighting dog to kill, and after the fights, they just dump the lifeless and battered bodies of the dead dogs out in the woods somewhere.
Sometimes, it seems to me that man's cruelty has no bounds, and it is hard to understand how a human can have so little compasion for animals.