Meet the result of a secret military experiment. Fifty years ago the Czechoslovak border guards wanted the ultimate guard dog, to protect the "iron curtain", so they cross-bred Carpathian Wolf and German Shepherd. In eyes of military, the experiment was epic failure: the dogs were too smart and independent to be used for this purpose.

But, in years after, the new dog breed emerged: the Czechoslovak Wolfdog.

For more photos of Esta, visit http://gallery.rider.cz/Esta/.