Probably not Shorty's cause I remember sometime in Land Before Time 10. Littlefoot asked his dad if there were any Shapteeth around. And Littlefoot's dad said something about them being cowards. And that there were to many dinosaurs in his group . Something along those those lines.
I can see a bunch of group of Sharpteeth maybe being a problem with Shorty's herd. Just not one according to what I heard.