It is an
illegal sport in which two dogs fight each other mostly till the
death of one of them.It is used for selfish entertainment and to make a profit from admission fees and gamblin
g. It has been happening they think sense the time people first started the domestication of the species. Thousands of innocent dogs have been breed specificly for this sport and are raised to be cruel. Also if if a dog does not die during the fight the losing dog mostly gets shot and killed anyway. Another thing is that they use is "bait" animals that are used to test a dog's fighting instinct, and these animals are often mauled or killed in the process. Trainers obtain bait animals from several sources: wild or feral animals, animals obtained from a shelter, or in some cases, stolen pets. They are smaller dog,cats,rabbits ect. It is
extremely cruel and wrong in all aspects of life. This sport still happens and is very underground.
http://en.wikipedia.org/wiki/Dog_fighting