Prepare the Meat: Begin by grinding the bison meat and fat (if using) through a meat grinder. For a finer texture, grind a second time.
Mix the Seasonings: In a large mixing bowl, combine the ground meat with garlic powder, onion powder, smoked paprika, black pepper, thyme, and cayenne pepper. Add water or broth to help bind the mixture.
Stuff the Sausages: Soak your sausage casings in warm water for about 30 minutes. Then, stuff the seasoned meat mixture into the casings, making sure to pack it tightly to avoid air pockets. Tie off the ends of the casings and twist sausages into links.
Rest the Sausages: Refrigerate the sausages for at least 1 hour to let the flavors meld.
Cook the Sausage: Cook the sausages by grilling, pan-frying, or roasting them. Ensure they reach an internal temperature of 160°F (71°C) for safe consumption.
Serve: Once cooked, serve the sausages hot with your preferred sides or store them for later use.