When Cujo was six weeks old, the ER vet said, "Oh, he has an over bite, well, that's ok, you are not planning on showing him."
I just called Cujo over to me (he is six), his teeth have a perfect scissors bite, no overbite whatsoever.
I suggest calling your breeder and asking them about it, and see if they want for you to wait or to consult some type of dental specialist. If this will clear itself up, then you will put your pup through pain and cost yourself a deal of money. A dental specialist is unlikely to tell you to wait and see. They are there to make money.
An over bite is MUCH better than an under bite. An overbite often corrects itself.
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC