First of all, I'd like to thank whoever decided to post this to facebook. It will literally take me days to read through all of the comments, and I am excited to learn from others experiences!
Second of all, thank you to every one who has taken the time to read this, and especially to those who have commented.
I would like everyone who reads this to know that I did what I consider to be thorough research on the pinless peepers before I ever ordered them. I searched many sites to see if people thought they were inhimane or not. I then ordered them, and once I received them, I played with them just to make sure that I thought this wouldn't hurt Bertha. When it came time to put them on her, I held her wrapped in a towel, and my husband applied them with his bare hands. She didn't not give any indication whatsoever that this hurt her at all. None. I let her go, and she walked a little crooked (like she was drunk) and flicked at them with her toes, but that was it. I'm sure she's not thrilled to have them on, and it may be slightly uncomfortable, but I feel confident stating that I don't believe they cause her any pain or distress.
Which leads me to today. It has been four days since she got the peepers on. Percy appears to have some tiny feathers coming in on her butt. No blood. Fingers crossed for hope there. However, I swear Bertha is meaner than ever. She again pinned down one of my BOs when two of them snuck out of the fence when I was cleaning the coop. The peepers have not impaired Bertha's aim at all. She is such a bully! I really don't know what to do with her!
Bertha & Percy are so attached. If it weren't for that, she would be long gone by now. When I had them separated, they would stand on opposite sides of the fence & stare at each other & chirp back & forth. As soon as I let Percy out, they took off side by side running down through the field to forage together like nothing ever happened. That's the only reason I am trying to fix this. They are generally pretty reliable layers. Also, it gives me some satisfaction to see them becoming more sociable (to people at least).
Anyway, thanks again to everyone. Keep the ideas & comments coming! I hope somone else gains insight from this post as I have. I can't be the only one to acquire adult chickens with bad habits!
Best picture I could get of Percy's incoming feathers