When I was growing up we had a dog named Shiner. She was a mutt and one of the best most loyal dogs I've ever had. Shiner did this thing, whenever she was tired, she would try to herd us kids into bed so that she could go to sleep. She HATED sleeping when my sisters and I were rampaging through the house and thought that it was her job to keep an eye on us all the time. Even in the middle of the night she would make nightly rounds to make sure every one was still in bed and doing ok.
I think Sadie is going to be like that.
Husband and I have been letting Sadie sleep in bed with us that way, when she starts moving around in the middle of the night, we know that she needs to go potty. This is great because we can take her outside before she has a chance to make a mess.
Lately, I've been going to bed before Husband (since I have to wake up at 4am for work) and take Sadie to bed with me. She can hear Husband in the other rooms and whines because he's not in bed too. Eventually she exhausts herself and falls unhappily to sleep. In the middle of the night she will move from sleeping on husband's feet, to sleeping on my feet, and back and forth all night long. If we get up in the middle of the night to go to the bathroom, she sits on the edge of the bed, ears perked up, and whines. I think she is really scolding us and telling us to get back to bed so she can get some sleep. In the morning, when I wake up at an ungodly hour, she does the same thing.
Sadie is almost 11 weeks old and she's the most watchful living thing in our household. I think we have ourselves a little protector.
Duke, on the other hand, doesn't notice ANYTHING when he is sleeping. If he does happen to notice, he heaves a big heavy dramatic sigh of frustration at our thoughtless interruption, rolls over, and falls back asleep.
Kind of like me.