I have been following this and learning along the way.I hope your hen will have the best possible outcome. 

Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
I tried to give her mashed up calcium and D3 with PNButter and then with Yogurt. She is a picky eater. So I put a tiny bit of oatmeal with the mashed calcium and she gobbled it up. Although I read oatmeal is not good for chickens, so I guess that will be very limited. Today I bought some Poultry Booster to add to her feed.I only use the all natural peanut butter that's 100% peanuts and no oils or sugars added. Compared to "Jiff", it actually tastes like peanuts and not some kind of cake batter.
She laid a regular egg about 4 days ago. Last summer she had a couple of eggs without shells, but it was also 107-114 degrees outside.It could just be a small hiccup in her reproductive tract so hopefully, it's just that. Has she laid any other eggs since that arent like that that you know of?
Not only is it a good treat for them, Peanuts are PACKED withProtein, Which is awesome for chickens!!!My chickens all adore peanut butter. You ever see a dog after it eats peanut butter? Chickens are even funnier!
I crush the calcium tablet with a hammer and mix it into a dab of peanut butter. The chicken gobbles it right up.
I found the article about oats, here it is: http://www.the-chicken-chick.com/2018/01/the-shocking-effect-of-oatmeal/It seems chickens have as many different food preferences as people do. You need to do whatever works for your chickens.
But, nowhere have I ever read that oats are bad for chickens. Quite the contrary, they have some exceptional nutritious qualities.
Some articles are good pointing out the negative, but other articles may be too extreme. Hard to weigh them all out. But I try my best. The gal at the Grange Coop told me to try the oats. I guess I just won't overdo it.I found the article about oats, here it is: http://www.the-chicken-chick.com/2018/01/the-shocking-effect-of-oatmeal/