It is still unknown how animals make friends, but for sure there must be some principle. Sometimes animals develop incredible friendships such as this 3-year-old Dutch Shepherd Osiris who suddenly has made friends with a 3-month-old rat named Riff.

Source: petpop.cc

Source: petpop.cc

Source: petpop.cc

Now Osiris the Dutch Shepherd and Riff the rat do everything together

Source: petpop.cc

Source: petpop.cc

They never leave each other's side

Source: petpop.cc

Source: petpop.cc

Indeed, opposites attract!

Source: petpop.cc

Source: petpop.cc

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Source: petpop.cc

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