Hello and Welcome!! Bill Jac isn't that great of a food- Between the chicken bi product, corn meal and recalls I wouldn't feed it. I would try to find Tucker a higher quality food. What treats were you giving him? Does he get any table food?
Peanut had pancreatitis a while back- table scraps, bully sticks, and Texas Toothpicks I believe was the culprit. Now he is on Canine Caviar food, and he only gets dog treats. No table scraps, no chew items AT ALL. I have been giving him Welless Pure treats. They don’t have bi-products, corn, wheat or anything nasty ingredients. He hasn't had another pancreatitis spell. He is really healthy and I tend to keep it that way!
For Tucker I would find a higher quality food and treat and just stick to that- don’t put anything else in the mix.
Wellness® Pure Rewards® Turkey & Salmon Jerky
Here is the Wellness treats, you can find them at Petsmart/Petco