Well how did they get there in first place?! Don't think aerial transportation was quite around at that stage of the timeline PMSL! If you recall, Chomper and his folks were actually on the mainland in LBT 2 before Littlefoot and co found them again on that island. How else would they have gotten there? The most logical explanation is that they walked there. This gives way to the explanation that the other sharpteeth managed to get onto the island but it just so happens that Chomper's folks are, as he so says, "the only big sharpteeth around..." ANY sharptooth could have wandered onto the island between the passage of time between LBT 2 and 5. That doesnt justify your argument that this sharptooth you claim to be Chomper's uncle is who you say it is...
