I got 2 chicks about 3 days old and took home a sad lonely looking duckling , then the next day we added in 3 chicks probably 4-5 weeks old that had come off hold, luckily as the older chicks were introduced after, the duck thinks it's in charge and they don't seem to argue as she is enjoying playing momma even though she is pretty young and fuzzy still. she is bigger than they are.