I must admit that my children did sometimes have "nappy explosion situations", so, much to my horror, the contents of their nappies were not always enclosed! I think if you take the attitude that anything that a child sits in outside the house could potentially have been contaminated by whatever, you would never let your child sit on anything. I am a dog lover and as such would like to take them everywhere with me, I know this is not practical nor always in the dogs best interests but I can assure you he will not urinate or defecate in a shop, he will not pester you to be stroked or salivate over you, he will do as he is told and not run around restaurants or pubs or start crying because he is bored or can't have what he wants, he will bark though just as people talk loudly at times and children cry. Live and let live I say I can't see John Lewis being overrun by dogs especially not by me, I always shop on line anyway, but it is nice to have the option to shop with your dog.