Thanks so much for the input. I can see that being an issue with the older dog. I am hoping that will not be a big issue. I think I may have an easier transition because my dogs are still young not 3 yet and a big plus is that they love to play with other dogs and they are all the same breed because it seems to me when they play they know that its another yorkie lol like they know they are the same lol. I am going out to see the pups again in a little while. Thanks again Verena