I think it'd be okay to try it again, just a little bit, and see what happens. Green poop is a normal response to too many new things at once or general stress, but it's not really too serious other than as a warning sign. She may do fine with a second attempt at chicken, or if she has green poop again, you can wait a couple months before you give it another go & see if it's related more to settling in & getting used to things, or if it's a reaction to the chicken itself.
Side note: Make sure the chicken isn't enhanced with added salt. It should say on the package if there's any added. You want the sodium content to be under 100mg per 4oz serving. Chicken (or any meat) that's high in sodium can sometimes cause itchiness, stomach upset, etc. in animals.
I hope you're well. I posted a thread but have had no replies yet so thought I would message you as you were so helpful when I was trying to chose a cat food
I gave Erin some chicken on her fourth day of being with me. I think it may have cause some green poop (stupidly I forget to write down exactly when the green poop occurred in my hog log, but I think it was about that time). I was wondering if it would be okay to try giving it to her again as she seemed to really enjoy it, or whether it's unadvised. I wasn't sure if it would cause green poo again or not.