What is Hip Dysplasia?

"Canine Hip Dysplasia (CHD) is an inherited trait involving multiple gene pairs which results in a spectrum of radiographic conformations. CHD is a developmental disease. All dogs apparently are born with normal hips but in affected individuals the radiographic signs of CHD can become evident within several months to several years. Therefore, the accuracy of diagnosis increases with age to about 95% at 24 months of age. OFA preliminary evaluations (dogs evaluated between 4 and 23 months of age) are about 90% accurate when compared to repeat studies at 2 years of age. "

Orthopedic Foundation for Animals
2300 E. Nifong Blvd.
Columbia, MO 65201-3856
Tel. (573) 442-0418
Fax (573) 875-5073

( http://www.breeders.com/chn/ofa/hip.htm#correction )

What is PROGRESSIVE RETINAL ATROPHY In ACDs?

http://www.Optigen.com

http://www.sheepdog.com/diseases/pra/back.html