I work at a feed mill and we offer 3 different kinds of Chicken feed. Chick Starter (medicated, so will not use). Chick Grower 20% Protein (we recommend feeding broilers 6 weeks of age to market this feed) and Egg Layer 16% Protein. I am getting 4 baby ducks and I am guessing they will be around 3 weeks old. What one should I feed them and till what age? Do you just free feed your ducks? Once they get older they will be free range most of the time. Note: These will be pets and will collect their eggs. Thanks!