All your ladies are dual purpose and due to molt if they haven't done so already.. Entering and exiting molt is another time hiccups are very normal!
Those are all dual purpose ladies.. and WILL do even better offer a flock raiser or grower free choice with OS on the side.. threats at 10% or less of course.. "layer" feed is usually 16% protein with is the minimum to keep a light bodied bird like leghorn in laying condition.. Dual purpose birds will do best with at least 18% protein & with 22% showing highest hatch rate.. which to ME says more nutrients in the eggs my family is eating also..
OS on the side.. means birds take what they need for THEIR lay rate and leave what they don't instead of processing excess through their kidneys.. *sometimes* (>3% in non laying birds, long term) increasing gout or even kidney failure.. though usually ALSO genetically predisposed somehow AND also fed a nutrient deficient, aka high treat diet (sometimes the pretty non pelleted feeds), Orp are one that it's been seen in. SKIP the scratch grain all together.. and find something else that's enriching but less candy bar/chip like.. hang a head of cabbage, lettuce, or broccoli just out of reach so they jump for it, spout/fodder your scratch grain, oatmeal, etc when possible. Skip oatmeal.. in general.. dry oats have some anti nutrients (challenging to sprout).. and formulated rations have added vitamins, minerals, amino acids.. oats are not that high in protein nor is scratch usually.. both will be diminishing protein and amino acid.. NONE is a problem.. as part of a balanced routine! Sorry, I have a tendency to ramble on.
Roosters are definitely not for every flock, and that's okay!
Float test is mostly irrelevant.. it measure gas inside the egg.. and that's about it.. I've never opened a rotten egg yet, even six months old they just get thicker.. Oh wait.. I saw an egg in the front yard this week.. and confused stuck my finger though it.. it was an incubator egg rolled out of the compost I forgot didn't smash when I tossed it.
Diatomaceous earth is a false sense of security that does not work well (at all) in humid environments like mine. One cannot claim "prevention" because they haven't faced an issue.. they MAY not have that issue. Weather, wild life load, stock density, soil type, etc.. ALL effect these things. So it's good to familiarize yourself with YOUR area and unique challenges.. but also recognize that the "norm" or what has been can change at any time.. Despite never needing to worm my dogs confirmed via fecal float or treat them for fleas in the decade past.. this past year saw all kinds of new challenges AND adjustments accordingly!
All links are same source but get the point across.. I sit firmly in the anti DE camp for a multitude of reasons.. though I don't claim it has no use or zero purpose, it is not welcome here to fill the air I breath.. food grade or not.
https://the-chicken-chick.com/the-cut-dry-truth-about-diatomaceous/
https://the-chicken-chick.com/diatomaceous-earth-de-benefitrisk/
https://the-chicken-chick.com/raising-chickens-naturally-diatomaceous/
Also, apologies to the OP as this post is bit off topic to the original question.. I will take note and try to remember to suggest maybe starting a new thread if doesn't seem directly related in the future!