Everything about the behavior was said here
, I agree with Margo . It's a question of a good contact, but I also agree that it's hard to make it.
I train with my dog since he was 3 months old. He pased Obedience exam reaching 195points on 200pionts max, and a judge said he shoud go on dog's conpetitions because he was really fantastic, but I now (what Mijke said) that if you leave your dog without training the dog can not be so nice.
But I also love to train with my dog even if he sometimes is not the best
