'When David and Tina Moody fell in love and got married, they created a kind of lopsided “canine Brady Bunch.” His male Yorkies made friends with her female of the same breed and a new family unit was created. Everything was working out wonderfully — until, that is, the girl pup went into heat. “When females are in heat, all they want is to be together, and they cry and cry and cry,” Tina explains. “One day, David thought of a way their dogs could still be together and simulate mating, but not actually ‘connect.’” And thus was born the Stud Stopper, a nonsurgical, ultra-humane form of doggy birth control.'
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http://www.vetstreet.com/our-pet-experts/the-creation-of-the-stud-stopper
