Dominoes: Two: A Close Shave?

When Wallace the inventor meets Wendolene in her wool shop, he falls in love with her at once. But why does her dog, Preston, hate Wallace's dog, Gromit? Then, after Wallace's new sheep-shaving and pullover-making machine falls into the wrong hands, things start to go very wrong. Can Gromit save Wallace from the danger of a 'close shave'?