its very unlikely that worms will go into the eggs. Its technically possible but I have yet to find someone who actually saw a round worm or other inside an egg. The idea is that the worm would crawl down the gut and then up the oviduct...unlikely...any worm that comes out is being shed and is usually and likely dead. worms inside are eating feed and have no reason to leave unless there are tons of them.
The think is that if you free range, you have worms...most chickens carry a load and they handle it with their systems. Thats the nature of outdoor animals that eat bugs. Earthworms carry the eggs and they are eaten by chickens!
I use the natural stuff, but they are only preventatives and usually they just help the chickens keep the population or load of worms down. DE does not worm chickens....it MAY prevent but the theory is just anecdotal, in that the crystals may nick the skin of the worm and kill it. If that were true then you would see worms coming out of your birds regularly.
creating an environment inside the chicken that is not friendly to worms is a good thing to do but you cant do it all the time or the worms will adapt. You can pulse acv (apple cider vinegar) in water. Cayenne in food...I buy a big bottle and put around 1/4 c. in the feeder with the pellets.
I have tried vermex and it doesnt work...I had a huge worm problem pop up in a certain number of birds while I was using in as per the directions....
You can try pumpkin seeds chopped fresh in the cusinart...there is a chemical in the seeds that gets released upon chopping. it paralyzes the worms....but be aware that this is a "chemical" much like what is used in wormers...
I believe that I have posted my worming regime in this thread so I wont go into detail here. I use wazine and repeat in one week with pour on eprinex. Eprinex has no withdrawal time frame so you can repeat that in a week.
If you use the fen you have to wait 2 weeks to eat eggs after the last does. I get the chicken versions from randall burkey or one of the other farm suppliers online, so I dont know about the horse doses.
There is an oral called wormex or something that is the fen stuff...and its 3 drops by beak.
I prefer water doses because I have so many chickens that its hard to be sure I get them all.
If your birds are young, not in a molt, and not laying, you really need to worm them (also check carefully for mites and treat for that if necessary.) In the winter laying will slow due to shorter days but you can provide them some light in the evening or morning with a bulb clamp lamp in the coop on a timer. If they still arent laying and are below 5 or 6 years old, I would strongly suggest worming.
It is not hard on them...its harder on them to be carrying around a load or worms...and you are paying for feed for worms.
Its pathetic to let them starve to death to the point that their production shuts down because you are worried about being "natural" whatever that means.
Natural chicken raising means that you control medications and throw the eggs away when you are treating them.
Please worm your chickens! Dont overthink it, just do it!