Cassie is not wild about Boomer at all....We are just taking it very slowly because in our case, she is an old lady at 14 and he is an unruly, obnoxious puppy! We are afraid they will hurt each other so we are just taking it day by day. Actually, yesterday, Boomer was on his leash but Cassie actually stood by him and tolerated him sniffing her and such. She even relaxed enough to sit down next to him...just baby steps!!! It may take some time but everyone will adapt! I have faith!