ETA-
Offered her another (larger) pinky- she hit it immediately, but let it go when she realized it wasn't *actually* a worm.
Kept teasing her with it, and re-sliming it in the worm dish as it dried out, and after a few half-hearted nips she grabbed it by the nose and gobbled it down.

Such a fussy gal- It had to be seasoned and positioned 'just right'!