Im getting my GSD puppy soon and am getting everything ready. Puppy pens seem like a good idea for the house if you can't watch them 100% of the time? Any recommendations on them or other thoughts. She will be crate trained so she will have a crate anyway, was looking at more of a pen with more room. Or is this a bad idea with potty training?? I can't remember the last time I had a puppy in the house!!!!!