What an informative post, boots. Thankyou!
Our chickens, when they lay for long periods of time without a break, pop out eggs with thin shells.
As far as feed prices.... I KNOW! It costs an arm and a leg to feed feeder chickens. We did it growing up, and feed wasn't too bad. A few weeks ago my parents bought 50 feeder chickens, processed and everything, and it came out to about $12/chicken. Wow. When we asked them why it was so high they said the feed prices really gouge them.
We have a lot of free range chickens, and we don't feed them anything. They run around on the farm all day eating bugs and produce scraps and are fat and happy as can be.
You're welcome.
I am loathe to throw things out. We have lots of crushed toasted eggshells. I usually examine each egg as I pick it up to put in the basket. Whenever there are thin shells I add extra crushed egg shells to their feed. I do add a small amount nearly every day, so I don't have thin shells anymore.
There are a lot of common weeds you can feed them. Most of the things that grow in the fields & haven't killed/harmed cattle tend to be gobbled by my chickens. I've noticed the hens get the roosters to check out new things. If there's a new potential food dropped into their yard, they get the boys to taste it first. Smart move really.
For those buying grains, if you're in a rural or semi-rural area you might find it more economical to buy in bulk & store in a grain silo. A smaller grain silo might be suitable for a suburban yard. Friends of ours buy cert organic grains for their animals. I think the bulk amount works out to slightly cheaper than store bought conventional grains in 40lb bags.
Then there's the potential of sharing with local friends.
Dog food is too expensive to feed to chickens, but I admit buying something like a meaty loaf, beef liver or fish for them on Christmas Day and Easter Sunday. Try asking a local butcher or slaughterhouse for a bucket of scraps. You might get a discarded animal head, for little or nothing, which will keep the chickens busy for most of the day. Gruesome to watch though. Face the head away from the house windows - you don't want to see your beloved girls poking out the eyes as you dip a Scotch cookie in your mug of coffee.
We used to buy the expensive canned pet foods, but found the cheapest brand was more natural - no colors, real fish etc. Even the big name brands have lots of soy/textured vegetable protein/vegetable protein, which is really bad for dogs and cats.
We haven't purchased the dried food for a few years. The dried cat food had something addictive in it - possibly msg. Our cat ended up with mood swings, eczema & a few other yucky things, so when we got a companion cat, we stopped buying the dried stuff. The second kitty has never had those symptoms. The reason i mention this is because you're obviously going to eat the eggs, right? So, whatever harmful chemicals you feed the hens will probably end up in the eggs and meat & then in your tummy.
I find it delightful that you have a system that works well! Free-ranging, no feed, happy chickens are the way to go!