Undershot is the *lower* jaw with the front teeth in front of the upper teeth, or in the case of a goat, pad. Look at a bulldog. That is a classicly undershot (and correct for that breed) bite. _http://www.lbah.com/ushot.htm_ (http://www.lbah.com/ushot.htm) or _http://dogs.about.com/cs/disableddogs/p/malocclusion.htm_ (http://dogs.about.com/cs/disableddogs/p/malocclusion.htm) (the second link defines both terms). Overshot (or parrot mouth) resembles a parrots beak, where the upper front teeth (or pad where teeth would be on a goat) is in front of the lower teeth, usually by more than 1/4 " as defined. _http://www.evdsdentalinstruments.com/site/index.php?section=94_ (http://www.evdsdentalinstruments.com/site/index.php?section=94) This is a link with pictures of a horse with a misaligned bite known as Parrot mouth (or overshot).