Set crockpot on low. Add broth, chicken, bay leaves, onion, and pinch of each herb, and salt and pepper.
Let simmer for 6 hours. Remove bay leaves. Shred chicken with two forks. Add soup and gravy package. Stir and cover.
Prepare biscuits by cutting each one into four pieces and lining them up in the crockpot on top of the mixture. Cover for 30 minutes. Remove lid and with a small metal spoon start separating the biscuits and turning them over. Cover and cook for a remaining ten minutes.