I don't think this method is in the mainstream of fly tying. It seemed to me that making a dubbing loop of deer hair with the butt ends trimmed close would produce a natural hackling. It seems to work alright.
The top fly is a Mahogany Dun pattern.
The advantage of this style (although probably not recognized as a style yet) is that you can cut the deer hair hackle to the size you want rather than picking an expensive bird hackle which fits the fly.
Slipped this one in there. This cdc paradun has the new ice dubbing which is quite flashy.