I am guessing that you ment pancreatitis ( an inflamation of the pancreas, along with other symptoms) ...
From what you have described and others have asked, please have your nieghbor get the dog into a vet, if they have not already...
We can not make a good informed choice of what is going on here. That is up to a vet especially since it is a health issue and may turn out to be more serious then anyone here can help with...

The suggestions that have been put forward here are good, and if it is only a food allergy, or a nutrition issue then the change to a good quality food is a good remedy............ *****BUT***** with out a health check by a vet this may be something that may or may not be related to her past pancreatitis or a nutrition issue... Only a vet that can see the dog and examine it physically can make a truely iinformed decision...

Is your neighbor that you are referring to an adult, I ask this since they are having you do the research for them....