I have had cats for a number of years and I am amazed by how good their hearing is.

Mimi , No.1 Housecat, can tell the difference between our car coming round the corner and other cars. Even before we have arrived around she is sitting in front of the garage doors. I have watched her when other cars pass and she does not flick a whisker.

All three of them can hear the rustle of a bag of cat biscuits from long distance and no matter how quielty I try and open a can of tuna to make a sandwich I am suddenly surrounded by mewling mogs. Mimi seems particularly acute in the hearing dept as she has run across gardens on hearing the click of the can top.

And of course when they do not want to hear no amount of noise or words will make them blink.