Very mild cartoon violence throughout this U-rated film.
Probably in order to save their own skin, one of three trolls makes up a lie to the Snow Queen about having captured a flying reindeer for her. And thus the reindeer is kidnapped.
A large bird is captured by multiple humanoid pigs in order to get cooked, but gets saved later. There is a very short chase sequence in which a restaurant gets destroyed, and a car falls down from a cliff. Sounds of the car getting destroyed can be heard in the background.
Sleeping girl and bird fall down from a flying bird and land into ice water. They get rescued by two humanoid walruses on their boat.
Two characters get imprisoned by said walruses, but are saved by a flying bird.
A bird is freezed into ice, but is saved later.
Two humanoid penguins are trapped inside a bubble.