$ wget -O - http://placekitten.com/$[500 + RANDOM % 500] | lp
July 26, 2013, 11:43 p.m.
—
openiduser104
Explanation
$RANDOM
gives a random number.
http://placekitten.com
is your cat place
wget -O -
sends the output to stdout
lp
prints
Limitations
Tested on OSX
Cat rules