Crockpot Chicken and Dumplings

This is so good, my family loves it. Truly "comfort food"
4 skinless, boneless chicken breast halves
2 stalks celery chopped
1 1/2 C. sliced carrots
2-4 C. chicken broth
1 onion finely diced
1 bay leaf
2 cans cream of chicken soup
2(10 oz.) packages refrigerator biscuits(Grands) torn into 4 pieces.
1 t. poultry seasoning
1 C. frozen peas and carrots
dash of sage & thyme

mix all ingredients together in a crockpot except the biscuits. cover and cook for 5 to 6 hours on high, remove chicken and shred. Return to the crockpot, now add the biscuits and cook for 30 more minutes until the dough is no longer raw in the center. A few minutes before serving add the frozen peas and carrots.