3 days ago we welcomed Abby, an adorable black and tan chihuahua puppy, into our home. The problem is that she and our 3 year old chi Tobee are not getting along very well. The first day she came home he just ignored her, and now every time she gets near him he growls at her. Abby is very playful and every time she sees him she tries to pounce on him, and then he'll growl and go somewhere where she can't get to him. Tobee is also short-tempered around us now even though we are making an effort to spend more time with him than the new puppy. I hate to see him so upset and really want this to work out! Is there anything we can do, or will we just have to wait and see if they become friends? Any advice would be great!