Introducing a new puppy - Page 1

I have a six month old male who is trained everyday for work.  I have ordered another male from the same line.  What should I look out for when I have one older male (9 months when the new puppy is to arrive.)  The first male has very high energy and drive but is very sweet.  The puppy will be 8-9 weeks old when he arrives.  I've asked for a "harder" dog then I got before.  The breeder is one of the best in the world and I trust him very much, but I would take any of your suggestions.

Thanks

I like to introduce a new dog/pup in a neutral zone outside of the home place, like in a park, or even the front yard, if the older pup doesn't spend a lot of time there. The older pup/dog is normally less likely to be on the defensive when outside their home turf.  Even a fairly sociable dog can be more defensive at home than they would be in a neutral zone.  Do not allow the older pup to be alone with the younger pup until you are absolutely certain the older pup will not dominate and subjugate the younger pup, if you do not want him to become submissive.  If you want the younger pup to be harder and more confident, so do not let the older pup ruin this, even if it means you cannot have them together until they're of equal size.  I'm not a dog whisperer, and don't claim to be an expert in this field, just speaking from my own experience and what has worked well for me.

I am even less of an expert than altosland but can speak of my experience also.  I have two females, neither particularly fond of other dogs, and was worried about bringing in a new pup.

Here's what worked for me. I did it like introducing horses. Meeting only through a fence for three or four days.  By then they are more curious of each other than anything. Then I put their crates side by side at night and feeding times. I figured if they ate together and slept together they would eventually "pack" together.

Worked for me but my dogs are probably softer than the ones you work with.