Ann Becnel, a dog trainer in New Orleans, is busier than ever these days.

“I am getting so many requests for training that I can barely keep up,” said Ms. Becnel, who got into the business 35 years ago. “It’s overwhelming.”

April Chillari, the owner of Core Canine in Northern Virginia, is in a similar position. “Prior to the pandemic I would book up three to five weeks in advance,” she said. “Now I have a 10-week waiting list.”

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