Gemy here is a very interesting article for Legg-Calve-Perthes Disease.
http://www.akcchf.org/news-events/li...update0110.pdf
Since a recessive gene
may be involved, it is impossible to know if a clear dog (with no clinical signs) is a carrier. There is no method for detecting carriers of the disease.
Assuming that it is recessive, the presence of even one puppy with LCPD, shows that
BOTH parents are carrying the recessive LCPD gene.
So both the sire and the dam should be excluded as carriers. This also shows that the whole litter may carry the recessive gene.
Anyway... Lets hope in our lifetime that there will be a genetic test for LCPD