Thanks, Dog Sense. That article was great. A really creative way to solve the problem.
I haz flava and Miranda, I tried to shaking - no change. Tried shaking and eyballing - no change. Tried roll over until she relaxed. Made a difference but only for a little while. I don't remember having this problem with my previous GSD.
Tried distracting her from my feet when working in the garden. Not much progress.
She understands gentle really well. Today I sat on the floor with her - my feet tucked under - and I praised her and played with her ruff and ears constantly saying 'gentle' and that worked.
Have also just purchased pigs ears for her to chew on - right now she's enjoying one.
Thanks everyone for your input.