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How to teach a dog rear leg awareness for agility
If you haven't already, try gathering information from books, the internet and other agility dog owners about training techniques.
There are many videos on youtube specific to certain exercises and tricks.
Enroll in an agility class.
Although these can be quite pricey, you can always take the basic beginner lessons to learn and ask any questions you have about the sport. This is fundamental to your own learning as it isn't just your pooch pal who has to try new things.