Suddenly, my hen Fanny is rejecting one of the baby chicks. This is a little Dominique, and of the 8 I adopted to her, this is the only one she is rejecting, suddenly, after having them since Thursday. I tried introducing her to the other batch with my Barred Rock, but she isn't having it. What should I do with this poor baby? Fanny is chasing and pecking at it relentlessly.