She is doing well. She has kept down her last three liquid meals, and I haven't seen her doing the regurging behavior again either. She could have done it while I wasn't watching, but if so, nothing came out. She appears to be gaining some strength, too. At least she seems harder to hold when I am feeding her.
I'll continue with the liquid feedings for a few more weeks, then try a pinky head. If she holds that down, I'll feed her heads for a couple more feedings, then slowly work my way back up to whole pinkies. If she regurges again, then it's back to liquid feedings for a few more weeks. And so on, and so forth...
Thanks everyone for the support you have given me during this. I have hope now that she will make it.