Get the vet's opinion on the matter, the vet may be able to fix it, otherwise you can ask them to have it put down. It's about $50 - $150 dollars depending on your income, not that you should be that concerned about the price

Fractured Jaw's are medically repairable though so your puppy might yet still make it. Best of luck

http://www.sheknows.com/pets-and-ani...put-a-dog-down
http://www.mypetsdentist.com/pet-jaw-fractures.pml