Teddy's scrotum is virtually invisible! It's hard to tell where his testicles were if you somehow didn't know where they belonged. It's completely flat. He was neutered at 7 months and that's not incredibly young. Most male dogs who are neutered before 1 year of age won't have any visible remnants of their scrotum after being neutered.We have a 3 year old dog who still never lifts his leg, but we think he was neutered very very young. He was turned into a shelter at 1 year neutered, and has almost no, um, man sac.