It’s a long reply but it’s proven to work with my GS and other reactive dogs in my classes.
What kind of dog is it? Has she practiced walking the dog in the neighborhood while you are there? This case sounds so familiar to me. My GS had earned his CGC certificate. Several months after that, I became ill & weak. I struggled keeping my balance and my fear that I was weakened and not strong enough to walk him intensified. My dog became unsure of my energy on walks and began lunging &barking (he had no direction from me).
It’s taken quite some time for me to get back on my feet and walk him with confidence. I suggest you video her walking the dog. This can be done in the house (without distractions) and it will help the owner to feel a bit more confident. Reviewing videos of training sessions, gives you a specific goal and focus for your next training session.
To set the dog & owner up for success, have her place the dog’s “must have” treats along the route she will take in the house, and some in a pocket or closed Left hand. Position the dog to start on her left side, in-line with the direction she wants to go. Place the leash in her right hand with the dog being on the left side. The leash should be loose as it hangs low in front of the owner’s body to the dog.
1. With a loose leash, take 2 steps forward as she tells her dog “with me” or let’s go”.
2. Has she stops& the dog is beside her, she should verbally praise him and treat him excessively while he’s still positioned on her left side, in-line with the direction she wants to go.
3. Continue practicing walks in the house only adding on steps when he routinely walks by her side.
4. Once SHE feels confident and is clearly communicating what she wants her dog to do, begin to add some distractions. Place items on the floor along the “walk “( in her house) just out of the dog’s reach but within sight. You can use things like cheese, favorite toy, sliced deli roast beef. The bigger the distraction, the more energy & confidence the owner will need to walk him past it on a LOOSE leash.
I would try to demonstrate to her that focusing on the timing of the rewards is the key to having nice, enjoyable, loose leash walks with her dog.
Did she ever the walk the dog with her husband? Did he have any similar issues? Not knowing the dog’s past makes it a bit more challenging to figure out its triggers. However, when you focus on looking for the (big &small) cues, the dog always give a clue to let you know they’re not comfortable. Their bodies become stiff, they stare at the concerning object, or they begin to make low growls. Other dogs may try to retreat but being on a leash, they become defensive and often bite their owners out of frustration.
I really think teaching her how to do hand targets with the dog and other interactive play will enrich their relationship & help make their walks beneficial for both.
Good luck! Please let me know what you do and what worked or did not work.