As with everything on the internet, there is an overload of information available because everyone who has opinion can now share it with the world without ever knowing who is reading it or acting upon it. Because there is no consequences or comeback, the proliferation of information continues but that does not mean it is applicable to you, your situation or your puppy.
The relationship you have with your dog is as unique as you are and any changes to that relationship need to be assessed first before anything is undertaken and getting a puppy is no different with one exception. Your new puppy has no learned behaviour for you.
Your puppy has learned behaviour for the breeder because the breeder is the puppies first experience of humans and breeder and be very instrumental in how your puppy thinks it should behave when it arrives home with you.
Observe how the breeder interacts with the puppies and their mother as this will give you clear indications of what your puppy thinks is normal.
The biggest factor with puppies is the novelty factor as this means you are going to inundate your new puppy with attention, whether it wants attention or not, it is going gage a bucket load all day and night.
This is one of the biggest mistakes you can make and the reasons are very well dealt with in my book Puppy Behaviour the Havers Way. This goldmine of information covers everything from choosing your puppy, observing the breeder, bringing your puppy home and how to shape the correct behaviour in the first two days that will set you up for as easy as possible transition from breeder to living in your house with you.
You can find out all you need to know about my book, including how to order by following this link http://www.haversdogbehaviour.co.uk/puppy-behaviour-book. It will make a huge difference to get ing your new puppy!