When my blk/wht, Nika was a puppy at 6 months old she did this amazing escape and reentry. She escapes out of the backyard into the neighbors yard by digging under. Ok simple enough. She then gets out of his yard through the front picket fence (I don't how) and comes back to my house and gets into my front yard through my picket fence (not sure how) and when I pull up in front getting home from work she's sitting on the front porch. There's no place to dig under the picket fences. I don't think an 8lb dog could jump these fences.
Houdini is a Basenji