That's happened to me before. I used to take my cat Zasper on a leash and take her with me to Petsmart. One time this lady came up at started petting her saying what a beautiful Siamese she was, then she asked if she was purebred. And I was like I doubt it, she was a resuce and she was polydactyl, so even if she was pure she couldn't have been shown. The lady was just like, how sad. I loved Zasper for the great cat she was and I wouldn't have loved her any more or less if she was purebred or not.