Place a whole chicken in a large dutch oven or stock pot. Season with salt and pepper.
Tuck the quartered onions, carrots, celery stalks, and garlic cloves around the chicken. Place the herbs on the vegetables. Then cover with 8-10 cups of water. Enough to cover the chicken.
Bring to a boil and simmer covered for 1 hour, until the chicken is fully cooked.
Once cooked, carefully remove the chicken from the pot and place in a separate bowl to cool and debone.
Make the Bone Broth
After the chicken has been deboned, put the carcass back into the pot of chicken broth. Continue to simmer on low for 45min-1 hour.
Using a colander, strain the carcass and solids from the bone broth and pour the bone broth back into the pot.
Make the Dumplings
Add the shredded chicken, diced vegetables, and frozen vegetables to the broth. Bring to a gentle simmer.
Meanwhile, begin making the dumplings. In a medium bowl mix together the dry ingredients: flour, salt, and baking powder. With a pastry cutter, cut in the butter. Then slowly pour in the milk, gently stirring to combine.
Drop the dumpling dough onto the boiling soup. Cook for 10 minutes uncovered and then 10 minutes covered.