"The animal was thought to be completely docile. Some members of the team even stroked him before," a spokeswoman for ndF said on Wednesday after the deadly incident outside the former German colony's capital Windhoek last Friday.
The 46-year-old victim, who has not been named, was part of a team preparing an episode of Um Himmels Willen, or "For Heaven's Sake", a light-hearted and long-running series set in and around a Bavarian nunnery.
"He completely unexpectedly went for her throat," Ulf Tubbesing, a Namibian-German television veterinarian who owned the farm where the tragedy took place, told German daily Bild.
"I immediately ordered my farm manager to shoot the animal."
The woman died of her wounds at the scene.