Fundamentally, dog training is about communication. From the human perspective, the handler is communicating to the dog what behaviors are correct, desired, or preferred in different circumstances and what behaviors are undesirable.
A handler must understand communication from the dog.
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Well, The Dogs are often liked by you as your pets and as your guards. But it is not as simple a thing as it is sometimes understood because dog training is a tiresome task which really requires patience on the part of the trainer.
It is important to start training your new puppy as soon as you bring it home. Training can be done yourself or a professional can be hired.