Because of marked variations among individuals in a species, a precise weighing (in grams) of an individual bird is of key importance in determining its health status. Juvenile birds should demonstrate an incremental weight gain as they mature. For an adult bird its "healthy" weight should be consistent within a 5-10% range. Therefore, the value of this measurement is both diagnostic, as well as prognostic in dealing with a specific pet bird. Weighing your bird once a week in the morning, before feeding, can be of great value in "home healthcare" maintenance.