Thanks everyone
I don't take her to the Grocery Shop, but I had to stop by Walmart to pick up something on the way home from Petco, & did not want to leave her in the car alone. So I took her in with me.. & while I was there I thought I might as well knock out the shop.
The Walmart in our area does not seem to mind small dogs at night, so I was sort of pushing it going in during the afternoon.
I take her with me to Home Depot, & I always make sure to cover the cart with one of her blankets, & she has never barked or gone to the bathroom inside.