I have two jills who are sisters. They are 10 months old and have been given the Delvosterone injection to bring them out of season. In the past few weeks one of my wee girls is dragging her sister and pulling her about mostly by the neck, Is she mothering her or is it something else? Please could someone give me some advice on this matter. I will be taking them to the vet soon to get spayed. Thanks Murph.