Inflicting pain upon animals
The Prophet (sal Allahu alaihi wa sallam) said, “Allah has cursed the one who inflicts pain upon animals.”
[Sahih Al-Bukhari and Muslim]
The curse of Allah has also fallen upon the one who tortures an animal. He may simply kill the animal for no reason or amputate an organ while the animal is still alive. He may torture the animal by exposing it to loud noises and fearful images. He may tie the animal and shoot it dead or slaughter other animals as it watches. Many images of animal torture exist today like spearing a live bull, cutting the tails of dogs, killing animals in front of other animals, snipping ears or branding and burning the backs of cattle, tying the legs of horses permanently making them run according to racing regulation and locking up fierce animals from the wild into cages for humans to view as an amusement. These activities and the people involved in them are all cursed by Allah.
And Allah knows best!