Series presented by Heledd Cynwal. There are 13.5 million dogs in Britain. But how do you find the Perfect Dog' Led by dog specialist Dylan Davies and a chain of specialists and dog shelters, we help 4 families desperate for a dog. The family will get to spend time with each dog under the gaze of our hidden cameras within the house. After a week of wondering and discussing, the family will be able to choose which dog they want to keep as their Perfect Dog!