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According to the charges, two men were bitten repeatedly on the body and injured by the hound, while a woman was repeatedly bitten and scratched, and another woman was bitten once.

It is alleged that on a road between the long distance walking path and Cuilt Road, near his Blanefield home in Stirlingshire, Edmonstone was the owner of a Czechoslovakian Wolfdog that was dangerously out of control.

Dru Edmonstone, great-grandson of Edward VII's mistress Alice Keppel, faces four charges under the Dangerous Dogs Act.

It is alleged that Edmonstone’s Wolfdog was dangerously out of control

All four are said to have been attacked on December 4.

Edmonstone, 45, whose family have owned the historic Dunreath Castle since it was gifted to them by King Robert III in 1435, pleaded not guilty by letter to all four charges at Stirling Sheriff Court on Friday.

Trial was set for April 13 with a preliminary pre-trial review on March 21.

Czechoslovakian Wolfdogs were first bred in 1955 for use in military operations by the Czechoslovakian Special Forces commandos.

Dogs and wolves were intentionally crossed to create a breed with the pack mentality and disposition of the German Shepherd Dog, and the power and endurance of the Carpathian wolf.

Mr Edmonstone is already facing trial in March, accused of acting aggressively, shouting, swearing, and uttering threats of violence on moorland at Cuilt Brae, near his home, on September 29, and falsely alleging that, the same day, a gunman was threatening to rob people on the West Highland Way.