该疾病是一种幼犬发育性疾病，造成颌骨和头骨的结构改变。
It is a developmental disease in puppies causing extensive bony changes in the mandible and skull.
即使在幼犬刚出生的头四周里，你也能很有效的影响他们的行为与智力发育。
You can effectively influence your pup's behavior and mental development even in its first four weeks of life.
幼犬由于免疫系统尚未发育完善，容易感染犬瘟热、细小病毒等犬类常见疾病。
Puppies susceptible to canine distemper, canine parvovirus and other frequently-occurring diseases due to the puppy's immune system have not developed completely.
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