Dog owners are especially known to pamper their pooch, willingly springing for $295 plush monogrammed beds, or rhinestone sweaters and organic, all-natural treats.

Yet when it came to doggy day care, Marrow said he found it hard to find the kind he wanted for his two dogs, a 220-pound St. Bernard and a 165-pound bullmastiff.

Marrow, who was frequently on the road as a hedge fund manager, recalled touring care centers and finding the staff poorly trained to manage a group of dogs. It felt like pandemonium, and he worried about dogfights.

"I tried almost every doggy day care you could imagine," he said. "I was not comfortable for a minute leaving my dogs with any of them."

Marrow saw an opportunity after another doggy day care owner decided to sell his centers. Marrow has plunked about $4 million so far into renovating and opening six locations in the New York area, with five others expected next year. They range in size, with smaller 5,000-square-foot stores that offer a limited number of services to its larger flagship centers with more than 10,000 square feet of play space.

The amenities are plentiful. Inside its Upper West Side location, dogs roam free around a private outdoor dog park, splash in a small therapy pool or cuddle up for a nap on a cot. The facilities are cleaned using green products, and a high-end filtration system keeps the air fresh.

Marrow also hired Brewster Smith, a dog trainer who has developed a proprietary method used at Spot. To help keep the mood calm, for instance, there’s a no barking rule. Its staff, recruited out of veterinary technician schools, receive at least 50 hours in training in the method.