aggressive puppy?

Question
Hello. I have a 10 wk. old male cockapoo puppy. When he is playing or sniffing around and I pick him up, he changes his tone from a puppy play tone to a very aggresive sounding growl and has tried to bite myself and my 10 year old son. My first question is this just a puppy stage he will outgrow ( I've raised puppies in the past and have never heard this tone) or could it really be a temperament problem. My second question is, I have read different methods of dealing with this. One is to hold him down tell him no and dominate him , the other is that you should not try to keep dominating such a young puppy yet keep in his crate more and any time out of his crate he is either being walked to relieve himself or you are actually holding him in your lap for up to just30min at a time-then back in crate. I would greatly appreciate your advice as to what should be effective for my puppy. Thanks very much in advance.

Answer
Try this:

''Elevation for small puppies:  Sit on the floor and gently put your hands around your pup's middle, below his front legs, and lift him up.  He is facing you.  Hold him for 15 seconds.  Repeat until he no longer struggles.  If he is past 10-12 weeks, lift his front feet off the ground, but don't pick him up.  

Cradling for small puppies:  Hold your puppy gently on his back, as you would cradle a small baby.  If he struggles, hold him firmly until he quiets for 10-15 seconds.  With larger pups, you can do this as your sit on the floor, with your pup between your legs.

Quiet lying down:  Place your pup on the floor on his side, with all 4 legs pointing away from you.  Use your hands on his neck/shoulder area and middle, to hold him in this position.  When he is quiet, praise him.  Lengthen the time that you keep him quietly in this position.  When he accepts this position well, handle his paws and muzzle, while keeping him quiet.''

The quotes mean this isn't my original work.  It is copied from my Puppy Raising Manual.  I have long used these or minor variations of them, and they are very effective.  You may want to give him a belly rub while he is on his back too.  Helps bonding.  There is a big difference between him rolling over and demanding a belly rub, and you choosing a time to roll him over and rub his belly.  The latter cements your place as pack leader.  

I seldom crate my puppies when I am around.  Depending on the puppy, sometimes you have to put the puppy in its crate in order to get thing done that leave too little attention for the puppy.