What’s a dog to do when you don’t have a roof over your head and times are lean? If you’re a hound in Moscow the answer is an easy one: head underground.

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Below the hustle and bustle of Moscow’s busy streets lies the city’s massive and complex subway system, packed tight with commuters trying to get from A to B. But, if you look closely, you’ll notice that some of these commuters have four legs and a wagging tail.

These commuters are some of Moscow’s famous metro dogs – a collection of strays that have figured out how to navigate the inner workings of the subway lines to commute across the city. But who are these dogs and why are they riding the subway?

Source: urdogs.com

In Soviet Russia, teams of dog catchers would round up strays and use them for fur caps or as subjects in scientific experiments.

Belka the space dog, at the Memorial Museum of Cosmonautics. Source: Wiki Commons