Try getting a syringe that the body of the syringe will fit in her mouth past the damaged jaw. Cut the entire end off the syringe (where it tapers down to the needle nipple) so essentially you could push the plunger thru and out of the open end of the syringe. Tidy the cut end of the syringe body so it wont catch on the inside of her mouth, or stretch a little piece of rubber hose over the end to protect mouth/throat. Wet a fuzzy and suck it into the syringe, or suck up veg/worm or 'soup' like IV said, open her mouth and slide the open body of the syringe into her mouth past the damage close to her throat and slowly push the syringe plunger to leave the mouse/veg/worm in the back of her mouth, behind the damaged area
Good luck, and great work caring for her