
I had a Toy Poodle that had this, and she was on pancreatic enzymes for life. She had it for 6 years and I lost her just before her 17th birthday. Are you giving this as well as low fat diet?
I was super strict, she never had treats. Not in the way that my other dogs did. I fed her tinned Hills ID, eventually buying on line. But I also bought the dry Hills ID in the small bag. This was her treat when the others had proper treats. It worked, even for training purposes. We did obedience and tracking together.
Her other favourite treat was cooked vegetables. She loved her cabbage and carrots bless her. Being super strict helped her live so long, I'm sure of it.