it is awesome... Sport is such the 'perfect dog' for Darien. What is really cute is that he is VERY high drive but he will slow down and 'wait' for cues from Darien when doing agility. (vs most dogs who will continue on and do what is in front of them or what looks like fun)
Its one of those relationships that is wonderful when its 'right'. (We tried to get Scandal to work with Darien... he really loved her, but she had ZERO interest in him)