In the morning, remove chicken from the pot and clean meat off of the bones, discarding skin and bones. This takes a while so be patient. It is well worth the effort.
Put the chicken meat back into the slow cooker with the chicken broth and add the carrots, onion, bay leaf and poultry seasoning.
Cook on LOW for 7 hours.
Add pasta. Cook for another 1/2 hour and then remove bay leaf.
Mix the Bisquick and milk together to form a dough and drop by the spoonful into the slow cooker so that the top will be completely covered by dumplings.
Turn pot on HIGH and put cover back on to cook for 1/2 hour.