Scientists have discovered a mutation behind pugs’ weird little flat faces

So, I have what might be an unpopular opinion: there are cute dogs, and then there are pugs. With their squished little faces, buggy eyes, and snuffling breaths — there’s not much about pugs to recommend them (and I like dogs). But now, at least, scientists have a better idea about the genetics that make these little canines look like they ran face-first into a wall.

The category of squish-faced dogs, more correctly called brachycephalic dogs, also includes bulldogs, Boston Terriers, Shih Tzus, Pomeranians, and other breeds. Centuries of breeding have shortened their heads from front to back, and widened the roof of their mouths. The shape of their face can make it hard for these dogs to breathe, and their bugged out eyes are easily…

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