Although new information is coming out all the time, I have not been able to find medical resources that suggest a lowering of protein for pancreatitis. I’m not seeing it in the research I pulled up either.
“This enzyme stimulation leads to the need to differentiate among diets based on fat content. When minimal pancreatic exocrine stimulation is desired, patients should receive fat-controlled diets (e.g., clear liquid, low-fat full liquid, low-fat regular, very low-fat regular, and no-fat regular). The amount of protein given (10–40% of the total calories) has not been associated with a significant difference in pancreatic enzyme secretion.”
In fact this study suggests, in people at least, that protein should be increased due to poor digestion. “These changes in amino acid release and metabolism have led to the belief that branched-chain amino acid and glutamine-enriched amino acid solutions might be
of particular benefit in patients with pancreatitis. Although this idea makes sense from a physiological standpoint, controlled, clinical trials are still needed to confirm this theory. In general, at least 1.5 g/kg/day of protein are required to improve nitrogen balance. However, it is difficult to improve nitrogen balance to the point of normalization in these patients, with even more protein likely indicated if pancreatitis is combined with sepsis or
other complications” https://www.accp.com/docs/bookstore/psap/p5b7sample04.pdf
