I can only give you information ,based on my experience with my dogs. When I first got Alfie (who is almost 2 now) ,my mums yorkie was 11 and very placid with other dogs, so we thought she would accept him no problem. Boy were we wrong, she at first would not look at him, then she progressed to growling and snapping at him I thought that she would never get to like him, It took a while but we always supervised their little visits and eventually she began to come round to him. She now loves him to bits!!! So what do I do , I get a another puppy Lottie. She has been accepted more readily by my mums yorkie.
Maybe it would be an idea to try and get your sisters yorkie's to meet your yorkie one at a time , very supervised at first until they get to know each other better. I hope you get this sorted because they will all benefit from each others company.
__________________  From Julie  Alfie & Lottie  |