Ok so studying my chicken health book some more to add to the first aid list and came across this:
Use plain, water-based personal lubricant to gently push prolapse back in. More often than not, it will pop back out. After that, leave it alone. More handling with various ointments will cause the area to become more swollen.
According to this, you should see improvement within the first day or so.
What is the title of your chicken health book?
This isn't a health book, but I have Harvey Ussery's "The Small Scale Poultry Flock". It does have some health suggestions too, but it's more about raising your own back yard chickens and even a little for egg sellers, or meat sellers.
Chicken health for dummies. Lol.
I bought raising chickens for dummies before getting chicks. It has some tips. After Olive getting sick, I knew I needed more and I really like the other book too. Both written in part by owner of BYC. although many people here are trying to be helpful, I could have used more definitive answers and quickly. I spent too much time guessing what was wrong with people who were really trying to help. Anyway, I will probably get another book on chicken health just for my own confirmation and peace of mind when facing issues. Just cause I'm crazy like that!