Sonar is working a scent source located towards the close end of the gutter. This is the way she indicated on sources that were up, beyond her reach.
Here is Sonar in an actual search, checking the shore of the Grasse River near Canton NY. Sonar was a superb search dog and cadaver dog. Unfortunately she blew an ACL in training in Montana, and despite surgery, she never recovered completely so I had to retire her. She is now enjoying the couch at home.