I have two 8 years old aussie mixes, I've decided to try and train them in agility. They already know how to jump and weave a little. but are they to old to start agility competitively? They seem to love to learn how to do what I ask of them and they remember it very well and I do know I have a lot more to teach them. The reason I thought of this is because they are both very quick and agile dogs.