I would highly suggest a consultation with Susan Davis. She has worked miracles on lots of our babies. My Sissy actually had a dianosis of early stage Protein Losing Enteropathy and recent blood tests are now showing normal.
Susan has several excellent supplements. Lypozyme is what she generally recommends to aid the pancreatic process. She has also suggested using baby food as it is very easily digestible, which is a key with EPI. You will definitely need a probiotic as well. I believe along with low fat and lower fiber you may also need lower protein. This combination can be very difficult to find in commercial foods. I can't say enough good things about her. She knows her stuff!!!!
Pet Health Pet Nutritionist Holistic Pet