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If you ask John Combs what his biggest worry is, he'll say: "How will I feed Red?"
Red is actually white. He's a labradoodle rescue, just tall enough for Combs to pet if he reaches over the armrest of his wheelchair. Combs, 42, has cerebral palsy. He has difficulty speaking. But he has no difficulty saying the line most Americans have heard at least once: "Welcome to Walmart!"