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Boston Terriers are good-natured dogs, but they can require a little extra care and attention when it comes to training. In particular, they tend to be sensitive to angry voices. Snapping or yelling at your dog can overwhelm it and make it unresponsive to further training, so resist the urge to respond to the dog's bad behavior with your own. Instead, use positive reinforcement, which Bostons respond very well to. When your dog gives you the behavior that you want, reward it with affection, play, or a small treat. Withhold your affection for bad behavior, rather than responding with anger. This is another training area where Boston Terriers require a little more work than the average dog.  While your dog is learning this important behavior, be patient and persistent — with consistent, regular training, it will learn. See our housetraining article for specific training strategies. A few tips to remember include:  Try not to leave your dog unsupervised indoors before it's house trained. If you have to leave, use a crate or kennel. Dogs almost never soil the place that they sleep. Let your dog out frequently. Ideally, you'll want to give it a chance to use the bathroom after it wakes up, before it goes to bed, after meals, and before and after you put it in a crate. Praise or reward your dog every time it goes to the bathroom outdoors. As noted above, Bostons respond well to positive reinforcement.  If you catch your dog in the act, use a stern "NO" to get it to stop. Don't scold or hit it. This can confuse the dog, making it more difficult to housetrain. All dogs benefit greatly from the process of socialization — introducing them to new things in a safe, controlled environment. If you can give a dog pleasant, positive experiences with new things as a puppy, you can avoid a host of behavioral problems later on in life. While it's possible to socialize a dog at any age, most professionals recommend starting around 8-12 weeks of age.  A good guide to socializing your dog is available here. The general principle is that you'll want to introduce your dog to new people, animals, objects, and places gradually and one at a time. Make your dog feel safe by staying near it and offering plenty of affection when it reacts well. Things to socialize your dog to include: children, other dogs, new places, cars, loud sounds, people who use a cane or wheelchair, odd objects like umbrellas, and so on. This is a controversial opinion among some dog owners, but there are many, many good reasons to give your dog this procedure. In addition to being quick, cheap, and safe, spaying or neutering your dog:  Prevents unwanted puppies. Results in a less-aggressive temperament. Prevents undesirable sex behaviors like humping, urine marking, and female "heat" behaviors. Prevents many types of cancer.
Be a gentle trainer. House train your dog patiently. Socialize your dog early and consistently. Have your dog spayed or neutered.