I have an 8 yr. old - mostly Australian Shepherd, but not purebred. I trained her since she was a puppy and have never had a problem with her until this past weekend.
Our family went to our cabin in the woods -- we bring our dog along in the car. Our family was getting ready to go out for dinner and I told my dog to go inside the house (normally the command "inside" works with her). She just sat down on the ground and wouldn't move. She wouldn't "come". She would still "sit" and "down", but every time I approached her, she would run away (so, obviously, she wouldn't "stay"
. Eventually, I was able to reach her and I had to drag her into the house by her collar (she scratched my hand and arm trying to push me off of her -- she didn't bite me).
The next day, we were planning on leaving the house and, again, she wouldn't go into the house. This time, she never let me come near her. I had to leave her outside -- she was waiting in the driveway when we returned.
She has not problem about going into the house when our family is inside the house -- and she sleeps in our bedroom at night.
She's a smart dog and I know that she wants to come with us -- she tries to jump into the car as we are leaving, and she follows the car down the driveway for a bit before giving up the chase. Her bad behavior only starts once she knows we are leaving the cabin.
I don't have this same problem in my main house, only the cabin. I thought it might be because of thunderstorms we have had in the mountains, and maybe she is scared to be in the house alone -- but I don't know if that's the reason.
As a quick fix, I'm having to leave a long leash on her at the cabin so that I have something to grab onto and drag her into the house. I have never had to leash her before and I don't like having to do so. And even though I'm pretty sure she'll wait for us to return, I don't want to routinely leave her outside when we leave.
Does anybody have any suggestions on how I can deal with this problem, or why it is happening?
Thanks in advance.

