Thanks Dr. G, great advice as always! I'll run these suggestions by her. She goes for a walk every day.
Maybe this is far out there but talking about strengthening the neck gives me an idea: my grandma often brings up women carrying water jugs on their heads as an example of excellent posture/gait/alignment. I'm thinking she could carry something on her head for part of her walk, maybe just a thick book for starters. She never cares about looking goofy