Canine Hip Dysplasia
Hip Dysplasia in the United States of America
What is Hips Dysplasia and why is it a problem?
Breeders are becoming more aware of this problem, especially since it has proven to be an incredibly difficult disease to eradicate. It's a polygenic disorder, plus recent research has shown that environmental factors also attribute to the degree of severity. Because of this, it is still a common genetic defect among breeding stock.
The problem with disease is ten fold. From a breeder's point of view, It can eliminate a prospective animal from a breeding program, cause puppies to be returned or a refund to be issued. In some cases, the breeder might be required to help fund hip replacement surgeries at a greater loss than the original monetary value of the pet. If enough puppies are reported as being dysplatic, it can harm a breeder's reputation or that of a stud dog who sired the pups.
From an owner's perspective, their pet might require life long medication or suffer pain, limping, or crippling arthritis. Hip replacement surgeries or femoral head ostectomies are needed to have any quality of life. For the families who cannot afford this option, they might be stuck with deciding between putting themselves in debt with a loan or euthanasia.
Visual and Radiographic Diagnosis
These hips have no abnormalities present and are sound for breeding.
These hips have laxity between the femoral head and the socket, plus some remodeling of the femoral head.
These hips are showing severe remodeling of both the femoral heads and the sockets. This dog most likely suffers from pain and will require surgery for any quality of life.
- No specific genetic pattern has yet been determined
- a complex genetic model with multiple quantitative trait loci
- Some researchers have identified four loci in the development of HD, but this is in the beginning stages of identification
- Body weight
- Level of activity and stress on joints
Breeding to Eradicate Hip Dysplasia
Will Hip Dysplasia be the end of our breeds?
Zhu, Lan, Zhiwu Zhang, Steven Friedenberg, Seung-Woo Jung, Janjira Phavaphutanon, Margaret Vernier-Singer, Elizabeth Corey, Raluca Mateescu, Nathan Dykes, Jody Sandler, Gregory Acland, George Lust, and Rory Todhunter. "The Long (and Winding) Road to Gene Discovery for Canine Hip Dysplasia."Veterinary Journal (London, England : 1997). U.S. National Library of Medicine. Web. 29 Apr. 2016.
"Hip Dysplasia." CAL Home. Web. 29 Apr. 2016.
"Genetics of canine hip dysplasia." National Center for Biotechnology Information. U.S. National Library of Medicine. Web. 29 Apr. 2016.
Zhou, Zhengkui, Xihui Sheng, Zhiwu Zhang, Keyan Zhao, Lan Zhu, Gang Guo, Steve G. Friedenberg, Linda S. Hunter, Wendy S. Vandenberg-Foels, William E. Hornbuckle, Ursula Krotscheck, Elizabeth Corey, Nancy S. Moise, Nathan L. Dykes, Junya Li, Shangzhong Xu, Lixin Du, Yachun Wang, Jody Sandler, Gregory M. Acland, George Lust, and Rory J. Todhunter. "Differential Genetic Regulation of Canine Hip Dysplasia and Osteoarthritis." PLoS ONE. Public Library of Science. Web. 29 Apr. 2016.
"Orthopedic Foundation for Animals: Hip Dysplasia." Orthopedic Foundation for Animals: Hip Dysplasia. Web. 29 Apr. 2016.