I've taken Molly into Wal-Mart, Target and once into a Golden Corral (steak and buffet restaurant). Of course she was in her Kwigy Bo Alexa bag, and as she was quiet, no one knew nor noticed her.
I just ordered a stroller for her that I am anxiously awaiting. Between going with my daughter to her pug meetups, dog parks and an upcoming Trotters walk, I'm sure that it will come in handy.
I have on occassion seen guide dogs who were less than clean looking and smelling; but then their owners weren't much better. Perhaps the owners should be asked to leave and the dog stay. lol
In general though, unless necessary for some reason, I do avoid places that sell food.
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