"If there's still any doubt whether the pampering of pets is getting out of hand, the debate should be settled once and for all by Neuticles, a patented testicular implant that sells for up to $919 a pair. The idea, says inventor Gregg A. Miller, is to "let people restore their pets to anatomical preciseness" after neutering, thereby allowing them to retain their natural look and self-esteem. "People thought I was crazy when I started 13 years ago," says the Oak Grove, Mo. entrepreneur. But he has since sold more than 240,000 pairs (a few of which went on prairie dogs, water buffalo, and monkeys). "Neutering is creepy. But with Neuticles, it's like nothing has changed." Nothing, except there's a fake body part where a real one used to be."
I've heard of people having them implanted in their show dogs. The males dogs should be "intact" but some people neuter them anyway for various reasons. I guess it's a good way to cheat and not obey the rules