A friend of mine has a male Yorkie who wants to offer him as a stud. After countless hours of trying to talk her out of it, she won't give in. So since I can't stop her from spaying him, I could atleast educate her so that when she does breed him it is somewhat responsible.
I'm farmiliar with genetic tests for larger dogs, especially herding dogs, but toys aren't especially my forte. I've looked at almost every recource I have but I can't find which genetic health tests should be done on Yorkies before (or if) they are even bred.
By the way, Zorro, the Yorkshire Terrier my friend wants to breed does have a nice temperment, and nice structure, it's just that fact that my friend has absolutly no idea what she is getting herself into. If he was paired with the right female, and if his tests come out clear, then he could contribute some well-rounded puppies to the breed.
At any rate, thanks for your time! =]
The most common genetic faults in Yorkies are: Patellar luxation
Portosystemic shunt (Liver Shunt), Retinal dysplasis, and Tracheal collapse. The only one that there is a test for is the eye diseases, and that will only predict about 50%. The other issues generally appear by age three, with the Liver Shunt appearing around six months. So your friend should have an ortho specialist evaluate his kneecaps, and get him CERF certified for his eyes. Thanks for trying to talk her out of this! Maybe when she sees the cost of health certifications she will change her mind.