We have recently introduced a new puppy (dog) into the household.  We already have a 9 month old bitch also a OES, but it is showing agression to the puppy to the point where it bit him this afternoon for no reason!  I am aware that we need to show the first dog lots of attention etc but my main question is how do we deal with her?  Do we punish her? ie. shout and put her into another room or the garden.
Or is that going to increase the older dogs animosity towards the pup? Please help as I want to nip this in the bud now!

Please don't punish her for loving you so much that she doesn't want to share you with another dog! Any unpleasant reaction from you towards your older bitch is likely to make her resent the new pup even more. :( The usual course of action is, as you say, to give the older dog plenty of attention whilst virtually ignoring the interloper, and make sure she benefits from any interaction you have with the pup (bearing in mind that she's still a puppy herself, possibly just about to come into season and so a bit hormonal). Whenever you feed the pup, give her a little of her daily ration of food in her bowl (well away from the pup) - and of course never let the pup eat from her bowl!

Make sure she has plenty of one-to-one attention from you while the pup is crated or in another room. Your walks with her will of course be without the pup, so she can relax a bit then too. I'm sure she'll come round - children get jealous when they're presented with a new sibling out of the blue, and in the end they learn to get on fine! In the meantime, never leave the two of them alone together - both need protection from each other! Good luck!
:)

thanks for that - Millie is actually in her third week of season so hopefully next week will be her last.  We were hoping that she would mother Max!  so thanks for the prompt reply

She probablyWILL -- in time.

But right now she is in season, hormonal and moody (and i know that feeling!)...

This new pup is a pain, undoubtly nicking her stuff, getting attention, trying to bounce on her, test his teeth on her etc etc.

I have a 16 week old crossbreed pup with three adult dogs (although despite rising three, Dill is only an adult in years, NOT in mental maturity!)...

Rocky dislikes puppies, they annoy him, they disrespect his need to sleep a lot and generally get in his way. On top of THAT they chew bits of him, use his head as a spring board and tend to be noisy.

Dill LURVES puppies, except when they take his stuff. He likse to show them how to de-stuff toys and counter surf, and bark out of the window at other dogs.

Abby HATES puppies with a passion, go within two feet of her is to risk life and limb in her pointy jaws. She will nto tolerate ANYTHING in her 'space'.

Despite this, within a few weeks, Rocky is using the pup as a pillow, and begrudgingly accepting his role as puppy Big Brother, role model and idol.
Dill is his usual self and enjoying frequent wrestling matches.
Abby is still grumpy as sin and she always will be, but she isnt going to eat him and has stopped trying to find out how much it would cost to post him to Russia.

It DOES settle down. Give the older dog some time for peace and quiet, somewhere to escape to where the pup cannot follow. Re-affirm the status quo, attention to older dog first, treats first, feed first etc. Ignore minor grumblies, remove puppy if its being a pain.

If she DOES feel the need to reprimand the puppy, within the bounds of safety, let her. She should teach him a lot, although being only 9 months old she may not KNOW enough to do this -- this is one of the reasons it is advised NOT to have two young dogs so close together.

Watch out as they begin to get along, that the older dog does not revert to puppy behaviour, forgettng training etc and definately give them both individual training sessions etc so that they do not bond to one another rather than to you.

Em