"dgk" wrote in message
...
On Wed, 7 May 2014 06:37:15 -0700 (PDT),
wrote:

My cats know that when I clap my hands it's time to come in. Usually
they do so. But I'm not aware of anything like a dog whistle for cats.

I whistle for boyfie sometimes, four part tune that I can do without
artificial means.
He almost always appears very quickly because I sometimes whistle the same
tune when I am about to serve up his dinner. On purpose, because he is a
greedy boy and soon learned that my whistle can mean food.
Sometimes I just want him in so he never knows if he'll be lucky but he
hardly ever risks not coming in just in case his plate is full ;-)
I usually give him a few sprinkles (very few) to make it worth his while
coming to the whistle.