When I refer to "cities" in Laos, I mean large-ish places with paved roads, reasonably reliable electricity, consumerism and AC. You'll find both the high and low ends of that definition, the low being a place like Muang Sing that once hosted the largest opium market in Southeast Asia, but is now basically one street of shops; and UNESCO World Heritage site Luang Prabang on the high end with its riverside restaurants, resort hotels and colonial French architecture.
In the larger towns I also saw many more breeds of dog – more commerce brings more variety, I suppose – and some were even on leads. The majority, however, were roaming free. It's the Lao way.