[JoeyP]

Of course he's not going to be happy ....
Sharing your attention
Having to put up with a puppy's mischief

But what You need to do is figure ways that your older dog will
realize that it's in his best interest to like this new intruder

Here are some tips .....
play with the puppy and call the older dog
when he comes ... give him love and treats
repeat this scene a lot
at feeding times ... feed the older dog first
be careful about fawning over the puppy while he's around
when You give the puppy love ... make sure you do the same for the older dog
Dogs have a keen sense of fairness .... and if the older dog feels slighted he's not going to like the new pup