The pancreas maintains the body’s blood sugar balance, as the primary hormones of the pancreas include insulin and glucagon, and both regulate blood glucose.And because of this important funtion from the pancreas, unfortunately, diabetes is the most common disorder associated with pancreatitis.
Regarding proteinuria, many things can cause protein loss such as high blood pressure, UTI's, and even certain medications, so my thought is that with everything that is going on with Skippy the chances are likely that his urine does contain an abnoral amount of protein.
It is a really positive sign that he has an appetite. Some foods that are ok to be given to dogs with pancreatitis and kidney issues are chicken breasts (skinless, boneless), rice boiled to a mush consistency, eggs, and fish.
Love and hugs, Lori