But there's something very different about giving an animal a medication or a human disease and the animal developing congestive heart failure or diabetes or breast cancer on their own.
但的确动物被动人为病变，与动物自身病变之间存在有很大的差异 给动物用一种药物，或使其患上一种人类疾病 是一回事， 而动物们患自己特有的充血性心力衰竭， 糖尿病，乳腺癌病是另一回事。