I would need to see the xrays. To be very honest, the rating is subjective enough that poor positioning during the xray can make the hips look worse than they are. I do want to be clear that I'm not supporting the small breed reasoning, but we've looked at hundreds of Havanese hip xrays, and have heard of more than a couple of prelims as dysplastic get an excellent rating later-all because of the poor preliminary xrays.
For this reason, I'd want to see the xrays. Havanese legs can easily be pulled out of the socket enough that the person doing the rating can't be expected to do anything but give it a dysplastic rating. Also, if the dog is tilted to one side, it can look like the socket is not large enough to get a better rating.
If the xray had good positioning, and looked less than ideal, I'd pass. If it was an xray poor enough that I really couldn't tell, I would ask for better xrays. Many times, the only difference between a Good, and an Excellent is the quality of the xray. It's hard to get an excellent without putting the dog under. We often send an xray off, knowing it will get a Good, even though we also know that if the xray had more perfect positioning, that the dog would get an Excellent.
Pam gets xrays emailed to her often to ask what the breeder should do, and I hear more "get a better xray" more than anything else.
But, Tom, as a breeder, if you got "dysplastic" X-rays on a planned breeding dog, and you thought it was positioning (and I KNOW that can happen!) wouldn't you go back and get better X-rays rather than breed a dog that you thought to be dysplastic? This breeder believes the dysplastic dx enough that she reported it to the potential buyer.... I guess we need to give her credit for that!
I know, both from Pam and other breeders, how bad positioning (or cranking on the legs of a small breed dog) can make good hips look bad. A friend recently had final hips done on a bitch that she had recently purchased. Before purchase, they had done preliminary hips at 18 months, that looked great. The vet who did the 2 year old X-rays clearly didn't know what they were doing. Her spine is totally crooked in the image, with the predictable outcome that one hip looks out, and they are TOTALLY asymmetrical. She bit the bullet and paid for another set of films from a different vet, and the bitch has absolutely fine hips. Rated "excellent" by OFA. But that middle set of X-rays? Wow!
But I would THINK that if someone serious about the breed doubted the accuracy of the the X-rays, they'd go get another set or at least a second opinion rather than just breeding the dog anyway...