犬髋关节发育不良(Canine Hip Dysplasia,下简称CHD)是犬的一种严重的遗传性疾病。由于CHD可使犬跛行,影响犬的运动,故又称“运动障碍症”。髋关节发育不良最早发现于人类。CHD的首次报道是在1935年。现已发现,CHD在几乎所有品种的犬中都有发生,而且以大体型品种的犬发生率最高。据最近的报道,发生率在10％以上的就有近50个品种,其中德国牧羊犬达20.7％。CHD的严重性,早已引起了人们的关注,国外的研究报道很多。近年来,我国陆续从国外引进了数批德国牧羊犬。经过几年的饲养繁殖,现已有了 Canine Hip Dysplasia (CHD) is a serious genetic disease in dogs. CHD can make the dog lame, affecting the dog’s movement, it is also known as “dyskinesia.” Hip dysplasia was first discovered in humans. The first report of the CHD was in 1935. It has been found that CHD occurs in almost all breeds of dogs and is most commonly seen in larger breeds. According to recent reports, the incidence of more than 10% there are nearly 50 varieties, of which the German shepherd reached 20.7%. The seriousness of CHD has long aroused people’s attention and many reports from abroad. In recent years, China has introduced several batches of German Shepherd from abroad. After several years breeding, now available