Training of a puppy. (25 day years old)

Question
I have a puppy of 25 days years old. Its a pointer & libray cross match.

How can I train it for a best dog that he obey me and understand me and also my smell?

Answer
The best possible thing is to return it to its mother and litter mates for another 3 weeks.  it is hardly old enough to beeating solid food.  

At that age, I am not sure they can even eliminate without the stimulation of their mothers tongue.  When it whines, you may need to remove it from its sleeping place and stroke it until it eliminates, then return it.  

I wouldn't even try to do any training until it is 6-7 weeks old.  Then find a book and work on standard obedience, keeping sessions very short, only a couple of repetitions at a time.