When Sue Perry adopted her dog Porter two and a half years ago from a rescue group, she noticed he had a hoarse, raspy bark. Her veterinarian confirmed the dog had been devocalized. "He really has trouble breathing even on a very short walk, and he coughs," Perry told CBSNews.com. "Before I really knew anything about this, they thought he had kennel cough. He gags so I have to monitor him closely when he is eating his food, and I have to water it down." "It's horrible, it's horrific," she said. "Don't do it. Devocalization should never be an option." And now she has a petition get the American Veterinary Medical Association to make sure it's never an option. Devocalization, or ventriculocordectomy, is a non-therapeutic surgical procedure that is undertaken to stop a pet from making loud noises, according to the Humane Society Veterinary Medical Association. As a result…