So my cat is afraid of dogs, except my 8 yr old dog who is her friend. She's 5 and i love her with all my heart, but am really interested in getting a puppy because my other dog has back problems and cannot do agility which i am interested in. The last thing I want is her to feel unsafe or run away, and we have a small house so i need help on how to introduce them. she is indoor/outdoor. Thanks