Season the chicken with salt and pepper and place it in your slow cooker.
Add the chicken broth, wild rice, minced garlic, onion, carrots, celery, rosemary, thyme, sage, bay leaves, and mushrooms.
Cover and cook on low for 6-8 hours or on high for 3-4 hours.
Once the chicken easily shreds with a fork, remove and shred it. Discard the bay leaves.
Add the shredded chicken back to the slow cooker and stir in half and half.
Heat for another 15-30 minutes, then season to taste with additional salt and pepper.
Serve warm, garnished with fresh parsley if desired.