Mexico's rescue and drug-sniffing dogs start out at the army's puppy kindergarten

In the middle of a military base outside Mexico City, an army colonel runs what he calls a kindergarten for dogs.

Puppies that one day will become rescue dogs, or sniffer dogs for drugs or explosives, get their basic training here, at Mexico's Army and Air Force Canine Production Center. The puppies are born and spend their first four months at the facility, before being sent to military units around the country for more specialized training.

Founded in 1998, the center has in the past produced breeds such as German Shepherds and Rottweilers.

Now, it exclusively breeds Belgian Malinois -- about 300 of them a year.

"It's a very intelligent dog, it's a dog with a lot of hardiness, very resistant to diseases," said Col. Alejandro Camacho Ibarra, a veterinarian and the center's director. It is the Mexican military's only such production facility, and Camacho said it may be the largest in Latin America.

The mainly green-and-white, one-story buildings look like any others at the military camp in the State of Mexico, near Mexico City. But the difference here is in the sounds that fill the air: high-pitch barking from dozens of puppies scattered through its maternities and training camps.