Jeff - yes, those are powerlines. The dog park I was in was built under a ton of power lines. It was difficult to shoot without having them in every shot.
I'm actually not that big of a fan of shot #2. It just doesn't really show you Keiko's personality. On the other hand, shot #1 is the money shot and even made the owner cry.
James - I can't believe you even brought up the idea that someone might have a problem with the dog's ear missing in #1. The composition is what makes that shot.
Fisheye was the Nikon 10.5mm.