BANGKOK — Minute by minute, the pile of dead canines grows. The first to die is a husky with swirling monochrome fur. Then comes a blue-eyed puppy and a puffball pomeranian. Later, a fat pug. All are pulled from cages and held down as government workers sink syringes into their bellies. They die squealing and struggling. One puppy blindly claws at a government aide and rips his rubber gloves. In just 15 minutes, the pile has grown to include at least two dozen dead dogs.