
As the above post says, your friend should become a member of some of the breed clubs, where the health screening information is available, not many Dane breeders unfortunately hip/elbow score there stock, but I would strongly recommend it, the eye/heart scoring is another which is not done in the breed at the moment!
But if your friend is going to breed, I would recommend, she hip/elbow scores her bitch, and does decide to mate the bitch, find a stud dog which has been scored too.