What an unexpected shock this must be for you and for Bonnie as well. I'd be happy to share a few thoughts with you that might be helpful.
1. I absolutely do support tube feedings that are done with the plunger. First of all, as you know through your experiences with Bonnie it is frequently the only way in which parents can give their child a thicker blended formula diet. The thicker formula often prevents many health issues and discomforts by preventing constipation or diarrhea and by reducing vomiting in many kids who have reflux. This is quite similar to the needs and preferences of parents who send a lunch to school with their child because of food allergies. And, you certainly don't see kids with allergies being sent to the nurses office or off-campus to eat lunch. . . despite the fact that they actually have identified medical reasons for eating the way they do at school.
2. I also support the plunge approach to tube feeding because it is much more normal