You're one sick puppy, you know that?

你真是一个变态的家伙？

The veterinarian had compassion for the sick little puppy.

兽医很同情那只生病的小狗。

To say the least. One sick puppy that aims to kill.

至少 是个想要杀人的变态。

I'm glad I haven't got the sort of conscience I've got to nurse like a sick puppy all the time.

我很高兴我没有像生病的小狗一样一直需要照顾的那种良心。