Su, yes, I'm from Canada. As far as I know there are no licenced dog shows that allow mixed breed dogs to compete in obedience trials. I have heard of an organization that will give dogs the equivalent titles to CD, CDX and UD, but this is only for UNregistered 'purebred' dogs, i.e. this dog's dam and sire are both Goldens, but this dog is not registered. How they go about proving that, I don't know. If I am wrong someone please correct me. As to obvious mixed breed dogs, I have never heard of any official obedience trials like that for them. This is really a shame, because there are some smart mixed breeds out there. Having said all that, I will say again what I said above - my dogs are family first and foremost, the obedience thing is a hobby to keep them alert and happy.