In large, heavy pot, combine soup, water, chicken, celery, onion, salt, poultry seasoning, and pepper.

Cover and cook over low heat about 1 1/2 hours.

Add potatoes and carrots; cover and cook another 30 minutes.

Remove chicken from pot, shred it, and return to pot and cook only 5 minutes longer.

Add dumplings.

To make dumplings:
Mix baking mix and milk until a soft dough forms.
Drop by tablespoonfuls into BOILING stew.
Simmer covered for 10 minutes, then uncover and simmer an additional 10 minutes.