If they have any way to both see and hear her, your plan could work. You have such a big chicken mama heart to make the attempt. So sad that someone may have dropped them off to fend for themselves ONLY because they didn’t want them. 😡 It sounds like they’re scared but are also tired of being...
I’ve used my recall pen to recapture Bobwhites successfully. I think your original idea could’ve worked with a larger cage and a sectioned-off area in the back for the pullet (where they can clearly see her). I hope you catch them. 😊