When I first got chickens I order the rainbow layer assortment from mcmurry hatchery. They sent 3 roosters and 25 pullets. When they were 15 weeks old we noticed the roosters mounting the hens. I thought the Roos were being mean so I ran outside and knocked them off , I did this for 2 weeks before I figured out what they were doing! Poor roosters Post your newbie mistakes!