Medication and dietary supplements are another reason why the weight of an animal must be accurately measured. Dosages for humans are typically standard. When a doctor prescribes two aspirin, that is generally appropriate for almost any size adult within the normal range. But some animals of the same species may be weigh a multiple of others of that same species. And certainly between different types of animals, there can be major discrepancies. A standard dose for a small animal may be completely ineffective for a larger one. And an appropriate dosage for a large animal may be toxic for a much smaller one. Therefore, industrial digital scales are often employed within a zoo for accurate weighing purposes. The construction of the digital scale chosen for th