We have 3 chi's (Bonnie included) and one sheltie. From the day that I brought Bonnie in, the Sheltie tries to avoid her. If Bonnie wanders into her 'space' DJ (the sheltie) gives off this shrill bark. This is now going into the 3rd month! DJ does play with her, but mostly she is annoyed at her. How can we (my roommate owns the sheltie) help her accept Bonnie without barking?