(AP) — The owner of an unusual wolf hybrid dog breed faces a deadline to move his dog outside Lincoln city limits.

A judge has denied a motion to delay an order by the Lincoln-Lancaster County Health Department to Alex Kaftan. He was told in a Jan. 17 letter to move his Czechoslovakian vlcak (VUHL’-chak) out of town within 30 days.

The city says the dog, Mars, is a hybrid cross between a German shepherd and a Carpathian wolf. Wolf-dog hybrids are barred from the city.

Kaftan says the vlcak is not a hybrid but rather a special breed. The Czechoslovakian Vlcak Club of America says German shepherds were experimentally crossed in 1955 with Carpathian wolves. Kaftan’s attorney says neither of Mars’ parents was a wolf.