Revealing mistake: When the ferret grabs the arrow with its teeth and runs away, the shot changes and it's very obvious that the arrow has been attached to some sort of collar around the animal's neck.
Continuity mistake: A thick cloud of steam suddenly appears on the lake between frames while Kiri is bathing. It makes everything more magical, but it's definitely awkward.
Continuity mistake: Kiri steps out of the water when the ferrets steal her clothes. She tries to cover herself with a small piece of garment around her waist. A frame later she is wearing a full dress.
Revealing mistake: Every time Dar's village is from the hill, it is a blatant scale model or Mayte painting where all the people and animals are suddenly missing.
Answer: The creatures did not eat Dar because the eagle landed on him, showing him as a friend to the eagle. They apparently worship eagles, as also indicated by the talisman they give him.