Whenever my husband or I talk sweetly to Sadie, she answers by wagging her tail and stretching. It can be predicted most times, she does it so often, she does a little bow with her bum in the air, then stretches out her back legs behind her. It's very cute but I've always wondered, what does it mean? I've never seen a dog do this before. Is it a sign of submission? I should try and get it on video this weekend, given the frequency that she does it, it shouldn't be too hard to record.