I suddenly feel so much better about our 50- 60 degree weather. I couldn't imagine still dealing with snow this time of year... or 80s, for that matter!
As for the 12 hr on, 12 hr off, I've been filling their feed morning and night, enough that they run out about 4 hours before I refill. It makes me feel better (I feel like I'm starving them if they go 12 hours straight without food!) and so far I've not had any casualties. I think food management is a matter of personal preference/ experience. A friend of mine who raises far larger numbers of meat birds several times a year, never restricts food, and has yet to lose one, out of hundreds. But she also butchers at 6 weeks, and I'm hoping for an 8-10 week grow. So, to each their own.
ETA: I started restricting food at 10 days old. They were starting to go bald on their chests and bellies from lying around so much.
So... I was thinking of making a chart, with % protein, raising style (tractor, free-range, or stationary coop), hatchery source, and average weights. Can everyone interested post their stats (protein, source, etc), the birthdate of their meaties, and their weights so far? (If you haven't weighed yet, or just got yours, just give me your stats). Then I'll post the updated chart each week, so we can see how the factors compare. What do you guys think?