I took Macy and my male dog, Miles for a walk today and she did great again.  She gets an A+ on the leash.  She doesn't pull and she trots nicely along side of me.  Really she's one of the best fosters we've had when it comes to the leash.  She doesn't seem to know any commands like "sit" so I don't think she'd had someone who trained her, rather I think that it again points to her personality.  She's submissive and just loves to be near people.   As her confidence grows and as she gets more familiar with our neighborhood she might start walking out front or might even start pulling a little but her nature is to be a very good walker.