What are the characteristics of the growth and development of ducklings?

Ducklings from hatching to 25 days of age are called ducklings. The main characteristics of their growth, development and management are: (1) They cannot maintain normal body temperature, so attention must be paid to keeping them warm. (2) Their stomach and intestines are small and their digestive power is weak. They should be fed a complete, easily digested and absorbed compound feed. (3) They are highly sensitive to temperature and other environmental conditions and have strong resistance to stress, so attention must be paid to environmental hygiene and to disease prevention and rat control.