My cat knows what I mean when I say "tinny tin tin". Means she is gonna be fed (tinned food). The other cats food we say "tweeties" (started off sweeties then treaties then went to tweeties) and she knows she will get getting some of her dried food. They know, "get down!" and "out!" too. My greedy cat knows when you have got a tin out of the cupboard, and can hear it open from upstairs and she is in the kitchen within seconds. Does anyone else's cats know what you say?