- Buying a "chick starter kit" and thinking the "brooder" (cardboard octagon) wouldn't be easily escaped; get shredded by curious beaks and feet; and leave behind a floor cover in more poop than my children produced in their entire diaper wearing careers.
- Starting with all pullets rather than having a rooster from the get-go, then free ranging my hens. Like Dolly Parton before me, I went from 9 to 5, but the hawks were the only ones who made a living. Haven't had any hawk attacks since Rufio starting crowing.
- Arranging to buy heritage RIR and SLW on Craigslist, finding the guy was raising his HUGE chickens (seriously, his SLW rooster was over 2' tall) in crazy overcrowded coops and runs, and buying them anyway. Guy regaled me with a story about some idiot customer who'd overfed some birds they got from him, then blamed him when they died after a few months. I took those birds home, fed them the right about of food, and about 2 months after I bought them they all dropped dead in less than a week.