I have an older dog who has had some digestive issues recently, though not pancreatitis. I found the prescription kibble hard on his system. If low fat is mostly what you need, I would look at raw goat. It is the lowest fat raw I have found. The best deal I found was at haretoday.com. They have a well balanced ground meat/bone/organ/tripe blend. Hope she can come home sooner rather than later!
First time Chihuahua owner with many years of dog experience!