I have a 9 year old Labrador and would be terrified of taking him into a shop, especially one with breakables. He is very well behaved and loves people, the trouble is that the most dangerous part of him is his tail. It is constantly wagging and as he turns around, it is likely to knock anything, within range, onto the floor. The number of times I have had to rescue a glass of wine, that I stupidly left within range, is innumerable. Love him to bits, but he likes the open air and is much safer there. Not much to break walking on a beach. I wonder how John Lewis will cope with the breakages caused by unruly dogs or even those well behaved, but happily wagging their tails in the wrong place.