@chickpeatay , how is your sick chicken now?
I have been reading through this thread and see it was highjacked with questions and responses about calcium and what to feed your chickens.
Responding with even more different ways of doing things.
I think first we have to get a better idea of what might be wrong with her. I think you're right to take her off the layer pellets since she's not laying, but it's almost impossible to feed one chicken something different. They can all eat the chick feed if you supply oyster shell.
Chickens can choose if you offer 2 kinds of feed. Since my last broody experience last year I give layer pellets in one container and chick feed in another.
My oldest who stopped laying only eats the chick feed. The others eat both. Oyster flakes and eggshells (preferred) on the side. Plenty of grit in the garden.
I did, thanks.
Organic feed for chicken tends to be expensive and nutritionally sub-par. I wish you every fortune in your search.
[I think you will find most of us prefer to get our nutrients as tasty food, not pills - Milk has LOTS of good things going for it other than Calcium, assuming you aren't lactose intolerant, of course]
Organic is more expensive but doesn’t contain poisons. It’s healthier. And your chickens won’t get sick from poisons in the feed.
The amount of poisons that get it the feed comes from farms who often use a lot of herbicides and pesticides. The corn, soy and wheat in the chicken feed often has so much poisons in it, that it isn’t allowed as food for humans. Because people might get health problems from it.
It’s not much of a problem for the chickens in the food industry because they only live max 2 years anyway. So there is no problem if these chickens would die at 4 years of age bc of all the poisons they have been eating for years.
Besides this there is proof (research in NL) that chicks who had organic chick feed overcome sickness quicker than chicks who had non-organic/GMO feed.
Maybe nice to know for newcomers. I have rarely had sick chickens. And I have 2, 10yo bantam chickens who still lay. And one that is 11. She stopped laying and was a bit ‘under the weather’ for a few weeks. Now she is definitely looking better and moving around as usual, jumps on the coop roof (4” / 120 cm) again. Of course this is also possible because my bantams are not inbreeded so much as industrial laying hybrids. And they have free range time most days. But I’m convinced the organic feed is important too for longevity.
Ini mini my 11 yo a few weeks ago in front. And Black one of my 10yo behind her. Both eating toasted non organic baguette

from the shop. I definitely give more than 10% treats/scratch. Probably around 30-40 scratch and left overs, which is fine in combination with fee ranging.