Running into dogs “big and small” has become a “new hazard of working atWalmart,” CEO Doug McMillon says.

Walmart last month started an in-home delivery option experiment in KansasCity, Pittsburgh and Vero Beach, Florida. It has said it plans to scale this$19.95 a month offering “aggressively.”

“We have this place on the app where customers can tell us whether they have adog or not,” McMillon told CNBC’s Becky Quick from the network’s Evolve Summitin Los Angeles this week. “And sometimes they misinform us about whether thedog is in the house, or not in the house.”

“We’ve had a few instances where we just stop the delivery, exit the home,call the owner and say, ‘We’ll need to resolve the dog issue before we putyour food in the refrigerator.’”

To make deliveries, Walmart said, employees must have at least a year ofservice with the company, background checks, motor vehicle record checks andextensive training.

Walmart shares have climbed about 28% this year. The retailer has a market capof about $341 billion.

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