Older Hens won't let my younger hen eat or drink

Remove the bully for a few days.

 

You could spray her with a water hose when she starts picking on the younger one to express your displeasure with her actions. Somebody on here has mentioned that before. DDawn, do you remember who that was?

If it is only one of the two, older hens you might try locking the aggressor up by herself for a few days. When you put her back in with the others, she will have been knocked down a bit in the pecking order and may stay confused long enough for them to work it out.

Each chicken has her own personality. You can never be sure what will work.

 

Squirt guns would work too if they are practicle for your set-up.

 

I've used a light sprinkle to chase mine out of a garden bed, after I had just planted. Just a sprinkle does it with mine and they scurry off. I find it satisfying to call after them, "Go find something else to do! You know, this hose has a higher setting!"

As long as she's eating her fill 2-3 times a day, plus drinking, she should get through this time okay. You may just have to referee for a little while. If you can set it up so they can't see both of the areas all the time, that may help. Can you put anything in the way to block the view, that doesn't block her escape paths?

I don't know how your area is set up, but you can also add areas higher up, if you have any spare tables around or something you can set up like that. If they get out of their run at all, you can add additional water bowls around for now.

You can also scatter some feed, scratch, sunflower seeds or other food around in a wide area. That way they can't be everywhere at once. They might also be too busy eating to watch her the whole time. Scattering food works great for that. You could also try some other food diversions to keep them busy. Like hanging a cabbage or putting greens or other foods in a cage. Something that will keep them busy. Again, they might not keep as close an eye on what she's doing, while they're busy.