It's a doggy dog world... in this episode we're talking pugs, bulldogs, and French bulldogs. They've all been bred for flat faces, but their airways haven't shrunk alongside their skulls - meaning that they often struggle to breathe. How has this happened? After evolving for millions of years, why are their airways literally too big to fit into their heads? Have they been betrayed by their own genes? Naked Genetics is on the case. Plus, the origin of puppy dog eyes, and we sequence the genome of Bruce the black lab puppy... Like this podcast? Please help us by supporting the Naked Scientists