You are getting confused between Trial dogs and drawing dogs.
Geronimo made noise on occasion , but was runner up, Dog of the Year in '71,'72.'73 and dog of the year in '74. You must keep some dogs if he wouldn't meet your standard for a drawing dog?
Total silence was a way of separating great dogs on any given day in just 6 minutes, a time quick enough to run through every dog in the competition. But not a real test of a dog, gameness or it's real ability as a Drawing Dog in the countryside where it mattered.
Don't let rules drawn up by the kennel club dictate to you or anyone what a