What If A Deaf Cat Had No Sense of Smell?

Over the past few months we've managed to successfully keep cats out of the garden with a combination of Lion Poo and a Sonic Gun (see entry here) . However today a ginger cat jumped into the rockery and was completely undetered by the sonic gun. Which begs the question what if the cat is deahf and has no sense of smell......


This one was in the parking square in Tideswell , so is OK.