We are new chicken parents and have 14 chickens- 4 that are about 15 weeks old old and the other 10 are about 12 weeks old the first 4 are 2 Barred Rocks and 2 Rhode Island Reds , and the younger ones are 1 polish girl, 1 mottled Houdon, 1 Salmon Faverorelle 2 black Astrolorpes, 2 Buff...