Designer dogs: What is a breed anyway?

There's designer clothes, but they have nothing on designer dogs!

They come in a huge range of shapes and colours and sizes, from the tiny Chihuahua to the Great Dane.

In the animal world this much variation usually means different species, but not for dogs — so where did they all come from?

And what role did Victorian-era rats play in the development of 'breed standards'?

Featuring:

Joyce Sullivan, papillon breederWayne Douglas OAM, Afghan Hound breederEsther Joseph, all breeds judgeMichael Worboys emeritus professor the University of ManchesterProfessor Greger Larson, evolutionary genomics at...