Lindsay says of this study, "Schilder and Van der Borg (2004) have published a report of disturbing findings regarding the short-term and long- term effects of shock used in the context of working dogs that is destined to become a source of significant controversy ... The absence of reduced drive or behavioral suppression with respect to critical activities associated with shock (e.g., bite work) makes one skeptical about the lasting adverse effects the authors claim to document. Although they offer no substantive evidence of trauma or harm to dogs, they provide loads of speculation, anecdotes, insinuations of gender and educational inadequacies, and derogatory comments regarding the motivation and competence of IPO trainers in its place." 
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If your dog isn’t giving you an obvious signal that they need to go out (like whining at the door) I suggest teaching them to ring a bell when they need to go outside. Some of the other signs dogs give that they need to go out such as pacing around or circling can be easy to miss if they’re in another room, which is why a noise based signal such as ringing a bell can make things easier.
What ? To house train my puppy I have to call a cab? Well, not exactly, here's the scoop. Puppies will decide to potty or poop instantly, giving you no warning. So many times when housetraining, a puppy is led to the door and on the way they just stop and do their business. This usually happens because the puppy has not developed enough bladder or bowel control yet to "hold it" until they get to the toilet area or they simply don't know where the toilet area is yet. Not only has the pup made "a mistake," but you have lost a chance to reward for going in the right place.
If your dog exhibits a behavior you don’t like, there is a strong likelihood that it’s something that has been reinforced before. A great example is when your dog brings you a toy and barks to entice you to throw it. You throw the toy. Your dog has just learned that barking gets you to do what he wants. You say “no,” and he barks even more. Heaven forbid you give in and throw the toy now! Why? Because you will have taught him persistence pays off. Before you know it you’ll have a dog that barks and barks every time he wants something. The solution? Ignore his barking or ask him to do something for you (like “sit”) before you throw his toy.
If you want to prevent accidents before they happen you’re going to need to watch your pup at all times, including every time they wander off. It only takes one accident to set your training back. Now I know that watching your puppy non-stop isn’t exactly fun & exciting, but being able to catch them before they have an accident is why this method works so well.
The idea of using treats to train is often equated with bribery. Truthfully, dogs do what works. If using treats gets them to do what you want, then why not? You can also use the world around you as a reinforcement. Every interaction you have with your dog is a learning opportunity, so when you think about it, you probably don’t use food very often except during active training sessions. So why does your dog continue to hang out? Because you reinforce him with praise, touch, games and walks. Just remember, the behavior should produce the treat; the treat should not produce the behavior.
Taxi your pup for about one month (until the pup is about 3 months old as this should give the pup enough time to develop some bladder and bowel control). By doing so, you will prevent many mistakes. At the same time you will train a stong preference in your pup to eliminate in your chosen spot. The pup will also learn that being picked up gets - kisses !
There are a variety of established methods of animals training, each with its adherents and critics. Some of the better known dog training procedures include the Koehler method, clicker training, motivational training, electronic training, model-rival training, dominance-based training, and relationship-based training. The common characteristics of successful methods are knowing the animal's attributes and personality, accurate timing of reinforcement and/or punishment and consistent communication. The use of punishment is controversial with both the humaneness and effectiveness questioned by many behaviourists.