I agree that it probably is going to happen alot because some people just dont know any better. You have a chance to educate them since they will be drawn to comment on your baby because it is unusual and good looking....
I would feel that a breeder should have known, but there are alot of people who just breed to breed and those who breed for money, and those who breed to better the breed...you know all those stories, and who knows where this lady fell into....Probably for sure the first or second group.
On the vet....to some extent you have to cut her a little slack...maybe a little less slack because it did not seems she cared to listen to you explain it...But, a little for not knowing....It is common not to know everything about every breed. From a medical standpoint all dogs are generally the same in the fact the the knee bones connected to the......etc.....You have to dive deeper to find out genetic issues and traits of a breed or lack there of and of course with the flooding of the "designer" breeds who knows what someone is going to walk in and say they have.
Most people research and learn more about what they are interested in. I know much more about Boxers now then I ever did before I owned one and like most people there was some point that everyone was not as educated as they are today...plenty of people dont know and did not know there were not black boxers....So like I say you have a great looking tool to educate with
