I also have a wonderful dog named Sadie - she's an Australian Shepherd about 8 years old. I just had to say I really love the third picture you posted, the one of Sadie jumping - it's awsome. So is the lovely Sadie. Border Collies (including mixes) are amazing at agility, you should consider getting her involved in agility training. I'm starting my Sadie in agility in January, even though she's a 'middle-aged' lady.

Congratulations, Sadie for being chosen for Dog of the Day, you obviously deserve it for all the joy you bring to the people in your life.