when vex was on a hunger strike i mixed both of those food and very finely ground kibble. It has to be a powder or it can't get through the nozzle (it expands when wet).
When you actually syringe, the food, i used an electrolyte drink or sugar water to start up his appetite (1ml) and then began syringing him food. I gave him 5ml a session to start, 4 times a day (20 ml total) and then set 10 pieces of ground up kibble in front of him and he usually ate about 1/4 of the bowl. After he started to "blow bubbles" with the food in his mouth i knew he was full. I then fed him more drink until he stopped taking it (dripped on him instead of swallowing). Oh, and be sure that she will most likely anoint over an electrolyte drink and the food, vex does it every time.
Also, when syringe feeding DO NOT hold her on her back as she can possibly choke. I only found out about this after vex started to gag and then puked because i was holding him on his back. The proper way i found to do it was to scruff him and leave his bum on the counter and heed it to him.
For vex i almost had to force feed him for the first day. I would insert the syringe sideways in the corner of his mouth up against his teeth and then press to fill up his mouth. He would then swallow whatever was in his mouth. I did this 3-4 times and then he started biting on this syringe and i could keep a constant flow. When he started to blow bubbles with the food i stopped. Also when she bites at the syringe, try to keep in the corner of her mouth as feeding her directly from the front she can choke.
Also please check your private messages, i sent you a link on this very topic. (sorry i can't post it here).