My Family

I have a cat called Rosie who is six and a puppy called Kyle who I found as a stray four weeks ago. I was hoping to re-home him but haven't succeeded. It looks as though he will be staying here. He is a cross Alsation/Terrier. The only problem is that Rosie is scared of him and has become a prisoner upstairs. If anyone could help me solve this problem please could you let me know.