Whilst most training is and should be done as a puppy, training should be a kept up through their lives. Some dogs will need help to ‘remember’ things they have been taught.
Consistency is key to achieve the best outcomes.

Undoubtedly the best time for a dog to be trained is as a puppy.  The main thing to remember when training a puppy is that the experiences need to be POSITIVE and HAPPY. It is also important that you remain CALM. Dogs sense your emotions and if they sense any unease from you it can lead to anxiety in your puppy now and in the
future, when faced with similar situations.

Introduce them to as many difference situations as possible when they are young. Some of the key things to introduce them to are:

People, including men, women, children and old people

Different places, including parks, busy places and places with different smells and sounds

Road traffic

Other animals

Travelling