this is just my opinion but if you breed for you baying type terriers you will soon run out of a line of working dogs, you need to breed the hardest to the hardest, if you breed from you baying stock and repeat this year after year you will end up dropping a hole to find your dog that is 3 feet off it game, nothing wrong with baying type terriers i have them and there 100% at what they do, but they wont be bread from
i don't think you can label any breed as a out and out baying type its just some lines/breeds have been kept more selective with there breeding, look at the border 50 year ago