Hello & welcome, I am Dr. B, a licensed veterinarian and I would like to help you with today. I do apologize that your question was not answered before. Different experts come online at various times; I just came online, read about your wee one’s situation, and wanted to help.
Again I do apologize that my colleagues could not aid you sooner, but can you tell me:
Any gagging, drooling, retching, lip licking, or grass eating?
Is she drinking much and can she keep water down?
Are her gums pink or pale/white? Moist or sticky?
Since you noted that she is breathing changes, can you take a breathing rate for me (just count her breaths for 10 seconds + multiply that by 6)?
If you press on her belly, does she have any discomfort, tenderness, or tensing?
Could she have eaten something she should not have (ie bones, toys, rocks, plants, chemicals, etc)?