Hi
To start with your question about Dogdean - there's a Dogdean Farm between Harnham and Odstock - not at all far from Britford. I'm not sure where the nearest parish church would have been but I think it could well have been any of those three villages. I've looked in my copy of BVRI, but none of those parishes have been transcribed, so we are definitely back to parish records.
I've only just been to the record office and am not planning to go back for a few weeks, but if no-one else goes before I do, I'll look it up for you then.
Best wishes
Angela