My yorkies brother is a 76 pound boxer (built like a race horse). They sleep with each other, play with each other, and just love each other. My boxer has always been around my children since birth and he is very gentle. I also want to mention that Snickers (the yorkie) is no little yorkie, he is about 8.5 pounds. My boxer and yorkie have free run of the house when we are gone. When we come home we can always find them laying next to each other at the top of the steps. In our house it is Snickers (the yorkie) who hurts Seamus (the boxer) when they play (a boxers big saggie lips are very sensitive to little yorkie teeth
).