A couple of scenes have peril but all fit the PG rating.
The dragons can be terrifying to younger viewers.
Divination scene added in live action with animal bones.
Hiccup takes a bite out of a fish that Toothless spits out to show peace. Some viewers might find this gross.
A lot of Vikings in this movie lost a part of their hands and legs that might be confusing and terrifying for younger children.
Not likely to frighten anyone over the age of 8.