Thanks, Fiona, that's so kind of you to say. Dogs are so much fun to train, I can't help but pass along things I've learned or read or heard from somebody else about how to motivate and keep going with them when they seem to be resisting.
With terriers, they were bred for independent, thinking- and focusing-ability so they can complete their ratting tasks w/out humans around to direct them complete their job. They are mostly on their own when ratting from start to finish. Some think it's a stubborn streak but I've always thought it's just the terrier making sure he really needs to do what we're asking vs. what he instinctively thinks is right, not pigheadedness. Once you can motivate and convince a terrier doing things your way gives them their best life, they quickly get on board with you and rethink you only occasionally.