短颌症（鹦鹉嘴畸形），种马
Brachygnathism (parrot mouth) is evident in this photograph of a stallion. The marked overbite is the result of the mandible and maxilla being unequal lengths.
Courtesy of Dr. Lisa Pearson.
在这些主题中
Brachygnathism (parrot mouth) is evident in this photograph of a stallion. The marked overbite is the result of the mandible and maxilla being unequal lengths.
Courtesy of Dr. Lisa Pearson.
