We have a border collie/ australian shephard mix, beautiful white merle color. Hands down the best dog we have owned. Truly is like a best friend. My wife absolutely loves her. She was easy to train. She never leaves our yard, you can let her out to go the bathroom and open the door and find her sitting on the step patiently waiting to come in. When she was less than 8 weeks old and little more than 5 lbs, having been at our house for only 2-3 wks ( we got her from a farm at 5 wks old) she somehow got out og a large pen attached to our house in back with access thru a dog door to the basement. My wife came home to find her on the front porch looking in our window. This dog, named lucy, is probably the most adept frisbee catcher i have ever seen. We have literally played frisbee with her nearly every day of her life-throughout the winter in snow and tonite in the 100 heat index since a few months old. This is at least 20 min a day every day. I run and take her running sometimes on the weekends, but she does not take heat well, so never when over 80' even though we keep her hair cut. Her color is really cool, almost like a snow leopard. Maybe we r lucky, but i would not consider any otherndog now and we've had all kinds, labs, blue heelers, dalmations, and mixed breeds. Definitely the coolest, cutest and sweetest dog i have ever seen. A joy to have her.