Welcome to YT and hugs to Sophie and the gang!!
We had a pancreatic attack last year. After the overnight vet visit - I served chicken and rice (50/50) for a week, then slowly worked in her regular food (homemade raw) over the next two weeks.
I don't believe that chicken and rice is a long term solution for a chronic situation; but if yours is a one-time episode, it can help your baby recover until the stomach settles back down.
If you need a long-term solution, then someone else is gonna have to pitch in.
Low-fat and small portions are the key.
Good luck!