BOSTON - Gregg Miller has designed some new balls for dogs, but these won't be used while playing fetch. Miller has just received an Ig Nobel Prize for his invention - prosthetic testicles for neutered dogs. It all started 10 years ago with an experiment on an unwitting Rottweiler named Max, and has turned into a booming mail-order business. Miller has sold over 150,000 of his 'Neuticles,' which come in different sizes, shapes, weights and degrees of firmness. According to the Neuticles website, the silicone implants allow a pet "to retain his natural look" and "self esteem." Miller is very honored to be given the Ig Nobel Prize, which rewards the humorous, creative and odd side of science.