I believe they do. My cats when I go away are right there to greet me when I
get home. Unlike yours they will not stare at the door when I am home. Of
course cats spend some time on the astral plane so maybe your cats are
watching the door for visitors.

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"Kristine Kochanski" wrote in message
...

Er, yes, and they understand English do they? And can think in human
spatial terms?? You only have to look at a cat hiding behind behind
something - it thinks cos you can't see it, it can't see you! I tell
my cats I'm going out, and sometimes they're sitting at the door when
I come back. Then again, they spend hours sitting staring at the door
when I'm *in* so that's not a very good gauge of their understanding.