My berner puppy is now 9 months old and no matter what I try she will not stand, sit, or lay still for even a minute of brushing. I've tried treats, I've tried waiting until she's tired, we've been doing short bursts of brushing ever since she was 10 weeks old. Nothing seems to work. She immediately tries to bite the brush, mouth our hands, spin in place to see what's going on. She won't try to get away, per se. She still sticks around after we release her. It just seems like one big game or something to her. It's making brushing out that fur very trying. And since we have many more years of intensive brushing ahead of us, I'd like to get this figured out. Anyone have any tips for training a puppy to stand, sit or lay down nicely for brushing?