Yeah, leave them inside if you can, or in a seperate area of the coop if you have room to make a second area. If you put her out where other hens (or hen? do you have only the two?) can get to them, watch them very VERY carefully... it's best to have them in a fenced off protected section so other hens can't peck them till they're very accustomed to them. Other birds can kill, hurt or even blind them really fast. Once they are used to having them around moving fast and making their peep peeps, they are not as likely to jump on them so fast.
I'm not saying Don't mix them, it's usually ok to do so, just let them figure out they're not 'prey' first. Consider how fast they dart in to grab treats away from each other if you toss them treats, let them figure out they're not 'treats'... hope that makes sense.