When Kate Humble decides she wants to breed from her dog Teg, she finds out that her beloved pet is a Welsh sheepdog. She sets out to learn more about this little-known and endangered breed, and discovers that a true Welsh sheepdog is a working dog. Kate wants Teg and her future puppies to be certifiably Welsh, and sets out to train Teg to work in the traditional Welsh way. Teg shows willing, and Kate works on her own shepherding skills, but will the demanding experts from the Welsh Sheepdog Society be impressed by the pair's performance?
Teg's journey from pampered pet to working Welsh sheepdog continues. Kate sets out to find out how Welsh Teg really is by tracing her family tree, while Teg does speed dating sheepdog-style at a meeting of the Welsh Sheepdog Society. There's plenty of interest, but will any of the potential mates be good enough for Kate's precious pooch?
Kate meets a team of researchers at the University of Aberystwyth, whose groundbreaking DNA survey into Welsh sheepdogs brings to light some remarkable facts about this unique breed. Meanwhile, Teg is packed off to a remote Welsh farm for some quality time with her chosen mate. If Teg can produce a litter of healthy Welsh sheepdog puppies, she can play a big part in helping this ancient and once-endangered breed survive for generations to come.