Snow (AKA River) came to us from Texas at 8 months old, the same age as our GSD Zeus. When Snow arrived she got along with Zeus, maybe they were both a little stand offish at first but they got along, which was a concern when introducing this new dog to our family. She also walked nicely on a lead but did not understand commands.

And:

1. She was an escape artist She would Jump over the fence, Dig under the fence. If you opened a gate she would squeeze through and go. Once she was out it was Impossible to catch her until she wanted to stop. Running in the street almost got hit by a car.
2. She would dig holes everywhere
3. She would rip out my plants
4. Destroyed both their expensive beds
5. Jumped on the furniture and beds. We don't allow them on furniture or beds as they have their own.

She was not at all the Ideal pet and at one point we were at our wits end. A Year later she is the perfect dog and a cuddle butt when she wants. While you are seated she will put both paws high on your chest and wiggle like crazy with kisses. If I sneeze no matter where she is she finds me and does the same, just to make sure I am OK, too cute. She consistently stays with me or not far away when we walk my property off leash outside the fenced in area. She digs very little (anyway, I can't tell which one is digging Zeus or Snow) If I do see either one digging, a verbal rebuke stops that immediately. No destructive behavior and stays off furniture or beds. The best thing is the relationship between Snow and Zeus. They are best friends and if I take one out and not the other, the one left behind stresses out. Getting her as a companion for Zeus was the best thing; in fact it has benefited both of them in the same way, each has their buddy. They are the same age and inseparable.The adoption changed not only her life but Zeus' and ours for the better.