Corgi is the name used for two separate Welsh herding breeds, the Pembroke and the Cardigan, and for corgi mixes. Both were bred to drive cattle by nipping at heels, which explains the low build, big upright ears and confident, busy attitude. Pembrokes are lighter and foxier, Cardigans are heavier with a long brushy tail, and a mix can look like either or neither.
In Columbia, a corgi's herding instincts tend to show up on walks and at the window. Expect barking at joggers, bikes and passing buses, and possible heel-nipping at kids or other pets until training takes hold. The dense double coat sheds heavily, and corgis gain weight easily, so measured meals matter. Dogs vary a lot, so get to know the dog in front of you rather than the label.