Bruce, one of my German Shepherds was recently diagnosed with EPI. at 4 years old. We had suspected it for some time and eventually confirmed with a blood test. He went from 41.5 kg to 31.8 kg in about 11 months. Bruce was put on to Lypex immediately and, while there was some improvement he was still subjected to diarrhoea about every 3 or four days. Reading up on the problem revealed a grain free diet was the probable answer.
I purchased a bag of Nutrix potato and salmon. The next part is almost incredible. I gave him a feed of Nutrix in the evening and next day absolutely normal stools!. He has had no gut problems since and I am on the second 15kg bag. He is putting on weight fast, 2kg in four weeks, and I can visibly see him improving. This is not even the food you specifically recommend for EPI but it is working.
I am actually tempted to say that Nutrix (and the medication)has probably saved his life and in any case has made him a much happier dog.
Thanks a million.