Plague Dogs:

Skinny Puppy used samples from this movie in their song "Testure".
It's a story about the escape of two dogs, Rowf and Snitter, from a government research station in the Lake District in England, where they had been horribly mistreated. They live on their own with help from a fox, or "tod" in his Geordie dialect...
(This is part one of probably a few videos that may be found online... It's probably not legal to have the entire movie for download.)