The statistics published by the OFFA show that breeding two dogs with «Good» hips together would produce 10 %
dysplastic offspring.
For example, while it is possible for any Golden with normal hips to produce
dysplastic offspring, a Golden Retriever with normal hips from a litter where the majority of its siblings have hip dysplasia may be at particularly high risk to produce
dysplastic offspring.
Note that this might be an overly rosy assessment because of incomplete, biased data; if bad scores are not submitted, the fraction of
dysplastic offspring will be an underestimate.
Breeders should provide registration numbers from the Orthopedic Foundation for Animals to prove them free of the disease even though dogs with clear x-rays can produce
dysplastic offspring.
Normal dogs can breed and yield
dysplastic offspring as the condition may skip generations.
However, even two parents certified clear of hip dysplasia can produce
dysplastic offspring.
Dr. Donald Patterson, chairman of Medical Genetics at University of PA School of Veterinary Medicine, states that some dogs with radiographically normal hips but a large number of hidden dysplasia - producing genes, if mated together, will produce at least
some dysplastic offspring.
Not exact matches
It has been found and is common knowledge, that one can mate two parents with OFA rated excellent hips and have
offspring that are
dysplastic; or mate two
dysplastic parents and get pups with normal to excellent hips.
Excellent hips may produce
dysplastic and affected parents may produce sound
offspring.
Through manipulating the genes in this breeding scheme, he is trying to identify hip dysplasia - causing genes in the normal and
dysplastic crossbred
offspring.