Complex sentence: These early breeds and types formed the basis of the modern potcake dog in both countries, since many residents of the Turks and Caicos Islands were originally from nearby islands and took their dogs with them upon relocation.
Split into simpler sentences: These early breeds and types formed the basis of the modern potcake dog. Individuals on the Turks and Caicos Islands have a similar history, since many residents were originally from nearby islands and took their dogs with them upon relocation.