Thanks for insight, was wondering because I bred my bitch back to her father . She has an underbite 2 out of eight pups have it. Looking to keep it out if its a prob an only few ways of doing so, pups are acting very well just notice one male does not grab as his brothers with hide or other toys. Still young so I was wonder if later he would be ok , but I have came to this that I won't bred him due to this