Hello everyone and apologies for joining the discussion so late.
The generally accepted dietary approach to dealing with pancreatitis is to feed a highly digestible, low fat food in the attempt to reduce the workload on the pancreas. Dottie, you are also quite right that too many fillers or less digestible ingredients are also best avoided.
In order to compare fat contents in different types of foods (dry vs wet vs raw etc) you do indeed have to work out the dry weight value which can be a real headache. Fortunately, we've thought of that and every product on the AADF website has a dial for the dry weight fat level in the Nutrition section of the review page. No matter what type of food you're looking at, these dials can be directly compared.
You can also go to the Dog Food Directory and select the exact dry level fat levels you are looking for in the panel on the left under 'Nutrient levels'. Again, since these are dry-weight, they work for all foods so no maths is required on your part.
That should make finding a low fat food a lot easier but what is, in my opinion, even more important is to find a food that is easy to digest. Look for a food that has the natural and the hypoallergenic logo highlighted (you can also filter for these under 'food properties') and the higher the rating, the more digestible and beneficial we would expect it to be for your dog.
You'll have plenty of dry options but you won't find any good quality wet or raw foods with only 7-8% fat (dry matter) due to their high meat content. Nevertheless, you will find a few with around 10-15% fat (which is still considered fairly low) and since the top end raw and wet foods are generally far easier for a dog to process, pancreatitic dogs do tend to do very well on them.
I hope that helps!