It's NOT legal, but it is happening.
Here is part of one story, the horses were also being feed to the hogs.
LeFLORE COUNTY, Okla. -- A LeFlore County, Okla., man and his grandson have been arrested in what many investigators said was the worst animal abuse case they've seen.
"This office has worked several cases of animal cruelty with horses and cattle, but I have never seen anything similar to this," said Sheriff Bruce Curnutt.
Albert McReynolds and William McReynolds, were taken into custody Tuesday evening on multiple counts of animal cruelty.
Investigators said they found multiple horse carcasses chained to dogs and scattered about the property.
"One of them (dog) was actually chained to the leg of a horse," said Curnutt.
They believe the horses were tied to the dogs so the dogs could feed off them.
Deputies were preparing to return with people to help them gather the dogs, carcasses and other horses they said are close to starvation on the property east of Honobia, Okla.
Here is the link to the story, the video is messed up or else you would have gotten to see the animals, carcasses, heard more of the story etc. http://www.4029tv.com/news/29996579/detail.html
And I've heard of worse.