Plague Dogs is an animated film. But not every animated film is intended for children. This film pushes its PG rating to the max, and has actually had a scene cut due to it being too horrifying, such as a man shown to be eaten by the dogs. The full film is only available on DVD in Australia I believe.
From the same creators of Watership Down, this is a dark, thought-provoking story of two dogs named Rowf (a labrador) and Snitter (a fox terrier) who are being used in invasive and inhumane animal testing research. The two dogs escape the laboratory, but their problems have only begun. They try to survive in the wild with a help of the "tod" (fox), but find themselves being hunted down by man after killing a sheep for food. The dogs are also said to be carrying to be carrying the plague.
The film could be found to be too preachy and biased about the animal testing debate as it only shows horrific and appalling abuse of the animals, but the original book goes into far more detail about the evils of it, as the film was intended to be more of an adventure story.
Overall, this is not a film for the kids. The PG rating appears harmless, but there is some truly shocking content here that's enough to upset even the hardest of adults. It is a very good film, not as great as Watership Down I found, but still good. Just don't pop it into your child's video player before bedtime.