我们的狗鼻子上有一个便士大小的肿块，她是一只白色的狗，但透过她的皮毛，这个斑点显得更黑。

我家狗妈妈后背肚子上长了一个大肿块，而且还肿了，导致她的腿也肿了，后腿不能走路，请问是怎么回事？

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I'm worried about my chihuahua, this morning she vomited white bile and has not eaten any food or water today. I'm worried because of her 4lb. size that she will become dehydrated

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