While I have no problem with a dog being in most stores, I would not be so happy to be around a bigger dog.
Another problem in having our animals with us all the time is with people who are allergic. An example my dtr is allergic to cats. When she had her senior pics made, they were allowed to bring something with them for props. One girl brought her cat. I was so worried that her senior pics would be ruined with red, watery eyes. By the time her pics were done, the reaction was setting in. Luckily she had gotten there a good bit earlier than the other girl. I wrote the company and let them know what I thought about it.
There are people who are allergic to dogs (I know it is the dander). Is it fair to people to put them in the positon to have to be around a dog when they go to the store? I can understand if they go into a petstore, but a grocery store or a restruant? If they allow dogs where does it stop? Cats. mice or even snakes? sorry if you have snakes, can not stand them,