I have eleven baby Black Australorp chicks; they are about a week and a half old. One chick I've noticed has had a plugged vent three separate times now. I've been able to gently squeeze the feces out of her all three times. Because this has happened three times, does that mean that there is a internal problem? Could I give her an enema, how do I do it, and how would I know when her system is clear? The other chicks have been checked and they're all clear and have no issues pooping. What can I give her to help her, should I separate her until I know she can poo on her own?