I think as long as a breed has a job to do then the breed remains the same, the minute they don't have a job that's when people start fcuking things up , bulldogs are a prime example, border terriers are the same, not enough people work them, so........ if they don't need to go down an earth then why do they have to be so small , and thus we end up with the heffalumps that are walking around now, I have Borders and love them but it's hell on earth finding small ones, and even harder finding small ones that work, as the saying goes " necessity is the mother of all invention "