I was 10 when we moved from Cardiff to Pembrokeshire. To lessen the trauma of the move our parents got my sister and me our first pets. Carlo, pronounced the Welsh way with a rolled ‘r’, was a smooth-haired, black and tan, Jack Russell terrier. Though he was named in honour of the Prince of Wales, as portrayed in Dafydd Iwan’s eponymous song1, it’s safe to say mam was no Royalist. A stupider dog would be hard to imagine; Carlo…