My math is substandard compared to some of these stories, yet, I'll do the math.
Never had chickens, never gave it much thought. Started watching what the bankers and the Federal reserve was doing. Studied Austrian Economics. Got more worried about the economy (my ability to continue a thing I call "eating"). Stocked up food. Looked at stockpile and didn't see much for fresh food except lots of vegetables grown on my property. Figured I needed protein. Thought about goats for meat and milk, but friends say they're terrible. Don't have room or grains for a cow or three. I thought "chickens". Self replenishing, easy to tend, chick food can be stored long term if stored properly(dry).
So, chickens were my choice of protein. Now how many did I need??? After research I figured I'd get .75 eggs per day. So, how many will I have to feed??? Myself ofcourse, then my parents if all hell breaks loose, that's 3 so far, then what about keeping my neighbors happy? That would add 12 more people(some I intentionally kept off this list for reasons I won't go into here). Don't think I'll need to feed them from day one, so as roos and hens do their thing, I can increase my flock. I figured to have two eggs per day for me and the folks, so that's 8 hens laying. Now I'd need meat too, but would one chicken a week suffice when augmented by my other stockpile? I tried to calculate the influx and outflow from this, but my math is failing me, so I just decided that 12 was a good number and that's what I got, then later decided to add 3 Redstars for eggs alone. Now that I'm typing this out, maybe I should figure on 3 chicken dinners a week (one for each adult).
The simple math would say if you want 3 dinners a week, then you'd need (3x52 weeks)=156 chickens but since they breed, the real number I'd need now would be substantially less, I just don't know how to calculate that. Given that they're at the peak of tenderness around 8-10 weeks of age, then I'd have to rotate 5-6 crops per year at 2-2.5 month intervals. 156/6=26 birds per cycle, or 26 hatched eggs per two months. What I don't know is the percentage of eggs actually hatch?
I have 15 birds, if the odds hold, then I'll have 12 hens, 3 roos. That means I should be getting 9 eggs a day, 6 of which will be eaten, leaving 3 to be hatched per day. Now if a success rate of 0.66 can be attained, then I'd get two per day hatched, that's 60 a month. That's well above the 26/two month cycle. Now since I plan to eat the meat as well, those numbers will drop. Then figure predator and gifting the neighbors(will need a strong community defense). Anyone got an algorythm to calculate this kind of thing????
I don't know , maybe I need more, just don't know. Anyone got any ideas? What do you see wrong with my thinking?