Hi Amy,
It does look like your baby has a larger upper lip and the "crease" is pronounced, but it isn't completely open to the mouth like a hairlip/cleft palate would be. Did the vet look at the roof of his mouth? Is it closed and normal looking?
I don't think an overbite would affect health. Things can change too when he loses his baby teeth and his adult teeth grow in.
I wouldn't worry unless he appears to have difficulty eating and swallowing.
__________________ Kristin, Max and Teddy |