The way I see it, gcode, it was just a normal (though very big and not very fluffy) dog. The publicans at the village let it loose on the moor to attract more tourists. It was probably confused and maybe hungry, but I don't think Frankland controlled it and set it on Henry deliberately. So shooting it dead was actually a bit of an overreaction (but wonderfully dramatic, as well as canon).
Frankland was relying on the drugs in the fog alone to drive Henry mad and kill himself. It must have suited his purpose very well when additionally, a real dog appeared on the scene, but for Henry, the combination of the drug and his real evil memories would probably have been enough.
The dog is a bit of a self-fulfilling prophecy - Henry, as an adult, returns to Dartmoor and decides to go public with his story of a gigantic hound. The story goes viral in the media. From that point onwards, it's only a matter of time until a real hound appears on the scene. As in, if people want to see it, someone will put it there. By making the story public, Henry was actually working towards his own destruction without knowing it.
Welcome to the Forum, by the way!
Last edited by La Jolie (September 17, 2014 7:00 am)