No fillers. Good source of protein. US inspected and passed by Department of Agriculture. No need to refrigerate. Family owned since 1945. Our company began in 1945 when Ralph F. and Alice Stayer opened a small butcher shop in Johnsonville, Wisconsin. Their philosophy was simple; make great-tasting meats and treat people well. Learn more about our story at Johnsonville.com. Find great recipes at Johnsonville.com. Questions or comments? Keep package for reference. Call: 1-888-556-2728. Gluten-free. Product of USA.