I have been adding a few drops of oregano oil to their water buckets every time I clean them out, then add a drop or two every other day as I refill/top them off I clean the buckets out completely at least once a week. I read somewhere that oregano oil helps keep the immune system healthy and can help prevent egg peritonitis.
Then around the first of the month (when I change out their coop bedding (my coop is built right on top of the dirt ground so I rake the bedding around to control the mess, then clean it all out each month)) I am going to add an electrolyte powder to their water buckets after I clean them, then the next week when I clean them do the oregano oil routine each following week.
I also mix garlic powder in with their feed (I’m also trying to develop a good feed ratio for them. They aren’t free range and hadn’t been giving them lay pellets because I have roosters, but I’ve had some laying issues lately and recently lost a hen, so am now feeding them one part all flock, one part lay crumble, and one part super egg feed with the garlic powder mixed in the all flock. Next time I need to refill the feed bins I’m going to mix game bird crumble in with the all flock for a minor protein boost since molting season is upon us). I heard cayenne pepper is good for them, too, so I might try out a half garlic powder, half cayenne pepper mix added to their feed. I also scatter hen scratch for them every other day.
I‘m trying to get into a monthly routine of doing certain things to help my flock’s health. It’s kinda experimental at this point. I have also given ACV in the past, but with a few of my hens laying soft shell eggs or no shell eggs, I’ve backed off on that. Maybe, once the lay pellets start helping with the eggshells, I’ll do an electrolyte/oregano oil/ACV/oregano oil each new week routine.