Hmmm....there's something going on here that I know I'm missing. It either looks to me like it was a grown person with a dog or a person with a child and the child was picked up at regular intervals...no, that can't be it...I give up...you've sure got me going with this one.
Yes, I think PJ is right - definitely an adult and a smaller person (female?), who got picked up occasionally on the walk! Certainly makes one think of what is happening here.
:)PJ ♪