I had Aussies and Border Collies until about 4 years age. They all ran agility and were ranked in the state of Florida so I sorta know what you are saying. After my last Aussie died Aussie Rescue asked if I'd take a Brittany Spaniel because no one would take him so he is what I have now. But I did love my Aussies my Border Collie.
They are both great breeds of dogs.. Blue is 2 1/2 and just cant contain the excitement at agility. Because I have back and hip problems due to an accident years ago I can't run so have to walk so he is learning to work away from me. Last week he did a round just jumps, tunnel, tyre and weaves and I did not have to move much and then just taking small steps so I was still moving and he did it beautifully, I was so pleased with him I punched both hands in the air and he got a round of applause from my class members... You will have to post a picture of your spaniel..