One of the joys of a guide dog is their ability to steer one clear of objects. Helpful #2 -- a major one. This can be anything from a little Missy pug in this set-up picture, or other people, obstacles that are in one's line of travel. Basically, a guide dog is told to go forward and if something is in the way, Cricket is going to walk around it and return to her line of travel (the straight line she is walking towards). If there is not enough space for us to both fit in the area, she will stop and let me know there is something blocking our path.
It could be a stick in the sidewalk that I put my foot one and realize is there and then maybe push it away and we proceed. It could be a person standing in the aisle at the grocery store that she weaves around. It might be a chair in a room that she moves around. Sometimes, I may know the obstacle that she has guided around and other times, I just feel her weaving around and know that she is doing good work. Good Girl, Cricket.
A tricky part is she must have an understanding of the size of us together when she is anticipating about whether we can move around something or not. She is a busy girl while she is working.
When Cricket is in our home, her harness is off. Also, in my office majority of the time her harness is off. Although, today as I whacked my body on an open door, I reminded myself that Cricket is available to work there, too!
I don't know how well I explained this - do you have any questions or comments? I thrive on them, you know :D