i would think that a properly trained PPD wouldn't have to be "converted" for sport (ASR or PSA). if you have control of your dog, those two sports shouldn't be a problem. just polish up the OB and you're right there. if you have some aggressive, vicious land shark who wants to bite everything that comes close to the handler and won't out (and don't emphasize control in your training), then yes, you'll have problems competing in ANY sport.