I agree! Even if I didn't care for them, I hate to see anything suffer!
So, I decided to let her out with the other chickens today - I only have four others now. That was a mistake. Petunia, who I guess is the new head hen, went right after her when she saw her. Got on top of her with her claws like a hawk. I had a book because I planned to sit outside with them to intervene in case anything like this happened and had to use it to pry Petunia off of her. Poor Marigold was hiding in the corner of the house, so I brought her back into her little cage. I'll have to let her have some solo free time tomorrow and then figure out how the heck I'm going to introduce her back into the flock.
Ooops! Well, when introduction time comes, I suggest that you put Petunia in 'time out' for a couple of days. That will change the pecking order and by the time you let her out, Marigold should be safe(r).