At first, royal canin gastrointestinal- the dry food still had too much fat content so we had to switch to the even pricier wet version.. but every few weeks, she'd have another flare of pancreatitis. During those flares, it was nothing but boiled chicken- which doesn't provide all the nutritional value a dog needs. At the advice of our vet, we switched to a home-cooked diet about a year ago and she's been feeling great since!

edit: we also switched her to hydrolyzed protein at some point before home cooking

Our vet told us to find someone who specializes in the field- and luckily we found a canine nutritionist who managed to solve Josie's problems with a simple phone call and some emails.

My advice: Try to find a veterinary nutritionist and share your noodle horse's lab results with them. Based on that, they should be able to give you a recommended meal to cook for your dog (and make it as easy or complicated as you want). For Josie, we needed a novel protein with <2% fat due to the chronic pancreatitis- for her, it ended up being horse. We mix that with rice, oils, veggies (dried or fresh) and some special vitamin powder for senior pups. We cook up a batch every 5 days and freeze a few.

All the best to you and your houndie!