Even if you treat them all the same as pups, she's different. She's got a great desire to pull, and she's all business. She's got a good work ethic, a positive spirit, and is able to take lots of pressure. . She's smart and a fast learner, following commands without distraction. Mushers spend more time with their leaders, so there is a close bond between them.
Many mushers have different leaders for different trail conditions.
If the trail is straight, the musher doesn't need a dog that follows gee-haw commands perfectly. Swing dogs run just behind the leaders. They are your dogs that you are training to be leaders. They are right behind the leaders, learning to follow commands. Sometimes you put them first and have your leaders in the swing dog position.