
Go back to your breeder and talk to them about what can be done and check your health guarantee. This would be a very rare occurrence in a puppy whose parents' hips were certified good or better by either OFA or Penn Hipp. Usually, breeders will help you out and help you navigate good vets, etc.
If not - the bad....
Depending on how bad the dysplasia is, be prepared to spend major, major cash. Even a minor surgery can run into hundreds of dollars and usually well into the thousands.
Worst case scenario: A friend of ours had a puppy with severe dysplasia. Unfortunately, he did not do his research and bought a puppy off of Craig's list. No testing was done on the parents at all so no health guarantee.
He spent well in excess of $10,000 on surgeries (stopped keeping track since he didn't want to know how much he spent anymore) for the next 3 years and still had to put the dog down by the time he was 5 due to severe pain and arthritis that had set in at the surgery sites.
So, worst case - big money, possibility of having to put the puppy down humanely to save it from severe pain.
Moderate case - big money, but surgeries are successful and dog will live a pain free life, although mobility might be limited.
Best case - medication can help keep the dog pain free and only minor or no surgery needed. Still will be a life time of meds, so some cash outlay each month. And mobility will usually be affected in some way.
And the above recommendation to go to a vet school for the surgery is excellent! Not only do you get the most up-to-date knowledge of the Vet professors, but you usually get reduced rates due to it being a teaching hospital.