Sift the flour, salt, garlic powder and pepper into a medium-sized mixing bowl. Combine the butter into flour with your hands until well incorporated. Add the chives and the soup. Mix together well with your hands to form a soft dumpling dough. Drop the dumpling dough by the tablespoonfuls into the strained liquid with an additional 1 cup of chicken stock. Cook the dumplings for 8 to 10 minutes.