siberian cats for sale The Siberian, Russia’s native forest cat, first appeared in recorded history around the year 1000 and hails from the unforgiving climate of Siberia. This is a cat that nature designed to survive, with no extremes in type. The Siberian is a medium to medium large, strong triple-coated cat with surprising heft for its size. The overall appearance should be one of strength, presence, and alertness, with a sweet facial expression. The breed is extremely slow to mature taking as long as 5 years.