Illegal Dog Ear Cropping

"Phoenix man arrested, accused of 'ear cropping & tail docking' dogs while unlicensed... There's a prevalent foul smell coming from the home near Lower Buckeye Road and 75th Avenue where these 16 dogs were reportedly caged without food and water and were surrounded by urine and feces"

Assuming this is all true (innocent until proven guilty) what kind of person takes a dog to a backyard like this to have their ears cut off? I can guess what the dogs might be used for as adults... bet I'm right...