"That's sad," said Montag, quietly,(referring to The Hound) "because all we put into it is hunting and finding and killing. What a shame if that's all it can ever know."

This quote is ironic because the society Montag is living in knows nothing at all, it doesnt know emotion or fear or sadness or hate. So when he says what a shame if thats all it can ever know he isnt thinking about how much of a shame it is that his society is a shame.