Well, there's not much to fix at the moment, but read through that info I posted & the site much explains what needs to be done to avoid a repeat. Calcium grit always available for the hens, & balance feed w/exercise. I've noticed lately that after free ranging all day, my hen & her youngins are barely touching their feed at night. I make sure some is available, but not much.
The gurus will say if I'm wrong, but I don't think goons are supposed to get scratch grains. I do train with white millet, but @R2elk advices no more than 10% of total intake. - I have no idea what their total intake is, they eat until their crops are full & their bellies are dragging. Lol. So, I use it for training and treat is mainly vegetable matter or herbs.
I'm sorry you lost your girls. We've all been there one way or another & more than once.Are you going to get some more hens?