AKC has just approved mixed breeds to compete in AKC events (starting in October). This will include agility and obedience. From the AKC web page:
Competition in Companion Events
Effective April 1st, 2010, the competition parameters governing mixed breed participation in AKC Agility, Rally, and Obedience events:
DO NOT buy a pet over the Internet, through newspaper ads, at a flea market, from a pet store or from a backyard breeder - even a neighbor whose dog 'accidentally' - or intentionally - got pregnant.
DO adopt your next pet from your local shelter or breed rescue group. Or if you decide to adopt from a breeder, make sure they are reputable. All reputable breeders provide detailed genealogical information dating back several generations, will have the mother available for you to meet (who will appear clean, well cared for and happy), should alwa ys provide a health guarantee and may require that you spay or neuter your pet as a part of the purchase agreement should you not be a licensed breeder yourself.
DO contact your state senators and representatives and ask them to support any legislation that would protect animals in breeding facilities. Let them know you are aware of puppy mills and that you want them to do something about them.
DO report inhumane conditions and animal neglect to your local authorities.
DO educate others. Tell your family, friends and neighbors about the plight of dogs bred in puppy mills and encourage them to adopt from shelters and rescue groups.
DO sign petitions that encourage putting an end to puppy mills and other forms of animal cruelty.
DO spay and neuter your own pets and encourage others to do so.
DO support your local animal shelter by making donations and volunteering.