A pet pooch gets a scrubbing inside the Dog-o-Matic washing machine. [Agencies]When a dog comes home from a walk filthy and smelling of something unmentionable, the temptation sometimes is to throw the darn thing in the washing machine.Well, now you can. An entrepreneur has come up with the Dog-O-Matic, a mini car-wash that transforms pets from filthy to fluffy in half an hour.Frenchman Romain Jarry, 31, who insists the device is not cruel, hopes to introduce it to Britain next year after it pro