Pulled Pork Sammies

Name: Pulled Pork Sammies
Ingredients: 1 tablespoon chili powder; 1 tablespoon dry mustard; 1 tablespoon onion powder; 1 tablespoon garlic powder; 1 tablespoon paprika; 1 tablespoon cumin; 2 teaspoon salt; 1 teaspoon pepper; 4 to 6 pounds boneless pork butt (excess fat removed); 1 large yellow onion; 1 tablespoon chopped garlic; 1 cup barbecue sauce; 1/3 cup apple cider; 1/3 cup low-sodium chicken broth; 3 tablespoons honey; 2 tablespoons Worcestershire sauce; 8 (456 grams) hamburger buns