Which kind of food items does the fowl eat; will it have preferred treats? Has the hen been to a veterinarian? If you're purchasing a young fowl, be sure it is completely feathered and thoroughly weaned (doesn't must be syringe fed or guardian fed). Indications of a wholesome hen include https://birdparadiseaviary.com/product-category/birds-for-sale/cockatiels-for-sale/