Please be careful. EPI means basically your dog cannot digest fat (this includes things like chicken skin). If you feed any form of fat your dog will get the runs. If you are feeding raw then you need to remove
all forms of fat from the food. White fish can be OK (cod etc.), but be careful of oily fish like mackerel, salmon etc.
This site has some useful information:
Cheetah's Canine EPI Exocrine Pancreatic Insufficiency FAQs
My friend had a dog with this condition and all she could feed him on was chicken breast (no skin), white fish and rice/potato/pasta.
If you can get fresh pancreas to add to the feed that will help.
What is the fat content of Natures Instinct Raw?
Sue