A man and small dog were found dead inside a mobile veterinary van in Queens Sunday morning, and another man was found unconscious just outside the running vehicle — possibly overwhelmed by generator fumes as they treated the pup, police sources said. Cops and EMTs arrived at the puzzling scene on 65th Ave. and Parsons Blvd. in Flushing about 9:25 a.m. They found a 57-year-old man and a dog dead inside the “Low Cost Vet Mobile” and a 73-year-old man unconscious outside, cops said. The man outside the van apparently took a spill and fell unconscious, though cops are still investigating what happened, police sources said. A generator could be seen just outside the front of the Ford E350, which was parked up against a thick snow bank on the driver’s side. Investigators were looking into whether the people working in the van didn’t have proper ventilation as the generator ran, police sources said. A sign on the van reads, “Danger. LP [liquefied petroleum] gas storage. No smoking or flames within 50 feet.” Cops have not yet released the dead man’s name. Medics took the unconscous survivor, identified by a co-worker as Garo Alexanian, to New York-Presbyterian Hospital Queens in stable condition. Alexanian is the founder of the mobile veterinary service. A coworker answering the door at Alexanian’s nearby home said the dead man was a veterinarian. “I worked with him a couple of times,” the worker said. “I’m just in shock right now like everybody is. He was a nice guy. He’d go out of his way to help you. He’d do anything for the animals as a veterinarian … He was just an overall nice person.” The worker said he believes that the vet who died was performing emergency surgery on a dog in the van, removing a mass from its paw, and Alexanian may have also been present. “I know there was at least two animals in there. We have one that’s still alive. We have her on supportive fluids and warming her,” the worker said. Regarding the dead dog, he sad, “It was a little white Scotty dog like if you see on (a) Little Caesar’s commercial…. He was being operated on his paw. He had a mass on his paw.” Neighbor Hector Romero, 71, said he brings his cat to the van twice a year. “They give a good price to the customers and everybody in the neighborhood,” he said. “It’s an excellent service. Very low price. People come from everywhere in the city. There’s a line.” ...read more read less