Because they are mean, heartless, cruel, evil, stupid, and crazy people that have no life! CURSES TO THEM ALL!!!! ANIMALS ARE AMAZING!!!!!!!!! I don't understand how someone could live with themselves after being cruel to animals!
Depends on what they're abusing it for. Lots of the time its misunderstanding/ignorance hence people who just have loads and loads of pets in small cages or stressful surroundings and don't even know they're abusing it. I knew a family that were like that, their guinea pigs just kept interbreeding and dying and one of their cats had its tail broken by one of the children who tried to pull it out by its tail from under a sofa. These people really irritate me because often they're the ones who protest about simple, non-abusive, disciplinary things like tapping a horse with a stick to make it walk or ordering a dog to behave. Then there are always some who just do it out of cruelty.
They do because they have no soul. They have no consideration to the animal's feelings what so ever. Unfortunately the animals have to suffer for their behaviour.
I guess everyone on earth really changed. most people show no mercy. Soon we will all realize our mistakes. Animals are one of God's creation, we should take care of them.
The reason that people abuse animals is because they cannot see the the beauty inside the animal, they are deaf to every animal's heart beats. They look into the animals eyes and only see their angry self staring back at them.