Place the whole chicken in a large pot with 12 cups of water. Bring to a boil, then simmer gently for 1 hour until the meat pulls apart easily.
Remove the chicken and strain the broth to keep it clear. Let the chicken cool, then remove skin/bones and shred the meat.
In the same pot, melt butter over medium heat. Add sliced sausage and cook 3–4 minutes until lightly browned. Add diced onion and sauté 4–5 minutes until soft.
Pour the strained broth back into the pot. Season with salt, pepper, garlic powder, bay leaf, and paprika.
Stir in the rice and bring to a gentle simmer. Add the shredded chicken back into the pot.
Reduce heat to low, cover tightly, and cook 20–25 minutes until the rice is tender and the bog is creamy. Avoid stirring too much to prevent mushiness.
Remove bay leaf, rest 10 minutes, and garnish with parsley before serving.