If you’ve ever spotted a dog with a tongue that looks almost bruised-purple or blueish-black instead of the usual pink, your first instinct might genuinely be to worry something’s wrong. But according to the American Kennel Club, for a small handful of breeds, that unusual colouring is completely normal, just a quirky, genetically inherited trait rather than any kind of health concern. It’s one of those oddities of the dog world that tends to fascinate people the moment they learn it’s real, so here’s a closer look at which breeds actually have blue tongues, and the surprisingly interesting reason behind it.
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