"Fox" by Margaret Wild and Ron Brooks

This book takes you on a journey, through red-orange scrubland and ochre deserts, where Fox "flickers through the trees like a tongue of fire."
Two companions, thrown together by tragic circumstance, embark on a journey that is interrupted by a meeting with a threatening stranger.
They become friends and help each other until a jealous fox enters the story to teach them a lesson about what it's truly like to be alone. This is a story about friendship and betrayal.
It may be a picture book but it's not recommended for children under 7 years old.