Charlie is a cutie! He does have a very long back. I would stay away from flyball. AKC will not allow participation in agility until 18 months of age. But the reason that you should wait to compete is because of the growth plates in the legs. Growth plates in Corgis do not completley close until 10-14 months of age. Norm is 11-12. Your boy has small bones from what I can see in the photo. That and the long back means that you will need a very experienced agility trainer, hopefuly someone familiar with Corgis. But. you can start him in foundation agility, (should have a basic obedience class first) as early as 8-9 months. He should not jump over 4" and the A-frame should be close to the ground. Only do three weave poles. Foundation class would be great fun and he will start to get the basic concept of agility. Plus, since we train with food, he will REALLY learn fast. ;-) Things to remember: The A-frame is the worst obstacle for the dog, especially small dogs. It can tear their shoulders all to heck if you don't do it correctly. Make sure that he has at least a 6' run before starting up the A-frame, and keep him going. The great thing is that simple jumps and weave poles can be made inexpensivley for your home. Great for practice. However, I do not recommend it for people who have not been to classes. If you want to let me know what area that you live in, I can recommend a good trainer. And welcome to agility! I hope that you get as hooked as we are! Also, you may want to locate a good certified Animal Chiropractor in your area. Agility Corgis usually manage to throw out a back or shoulder somewhere along in their quest for titles. Linda