This is a Benji movie, so most of us know what to expect. Some warnings, though: (Spoilers)
Benji is in CONSTANT peril in this movie.The wilderness is a scary place, but this movie is more like one animal after another wanting to eat Benji. Be aware little kids may not be able to handle this.
Also, one of the kittens is taken by a raptor near the end of the movie. Since Benji has spent the entire movie trying to defend the cute kittens, this may be upsetting. I personally found it needlessly cruel for a children's movie.
On the other hand, the movie has beautiful scenery. The eat-or-be-eaten view of nature is much more realistic than other movies for kids in which predators and prey often get along in sappy sweet storylines.