Almost everytime I go I see small at least somewhat well behaved dogs. So I'd guess it's more about the size and temperament of your dog. None that I saw were placard'ed, but given that isn't how ADA service animals strictly work I'd say use your judgment.
Sorry, never seen a dog in there. If your dog behaves, take a chance and take him.
I saw one in there the last time I was there. I guess service dogs are allowed.
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