When I got our new little girl Dec. 21st, both Zada and Azrael were traumatized. They had diarrhea and vomiting. This went on for two weeks before things settled. They now play with her, lay in "their" beds with her and are all good buds! It can take a week or two or even longer, but they soon learn to love each other eventually. Just don't let them be together right now without some gate or something between them. Don't worry.