Hi, we have an established group of three hens. Last Friday we were asked to take on another hen (someone had bought her for their grandchildren but only bought one at the parents refused to take her). I know you shouldn't really add one hen to a group but couldn't say no. Two of the hens have taken her on fine, the third will not leave her alone and attacks her at every opportunity. We have separated the new hen in another part of the run so the others can see her and she has slept in a cat carrier in the run but we need to put her with the others. Any advice on how to get grumpy hen to accept her?