You don't get out much, do you?

I was out walking Kana this morning. It's more of a slow stroll than a hike. We passed a couple and this was the conversation:

Weird Couple (WC): That's an old dog. How old is she?
Me: Yeah, she's almost 12.
WC: Well I guess that breed ages fast.
Me: Larger dogs don't live as long as smaller dog do.
WC: Maybe she'll make it another year or two.
Me: *glaring at them as they walk away*

WTF? I honestly think they thought they were leaving me with a happy thought, but why would you say that to someone? Well, she might be old, but she's more polite than you'll ever be.