In the middle of a military base outside Mexico City, an army colonel runs what he calls a kindergarten for dogs.
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.
Precautions here are strict because of a recent canine parvovirus outbreak that sickened some of the puppies. Visitors are disinfected with a spray, and must step into a watery solution to clean shoe soles. Only military personnel can touch the puppies. If you want to get close, you need to wear scrubs, shoe protectors and a mask, but you still cannot hold or pet the animals.
The training starts early in life, about a month after birth once the weaning process finishes. And everything is taught as a game.
“We start playing with the dog,” Camacho said. The idea is to draw them to items that trainers call “attractors” — like a ball or a rag — and puppies are challenged to catch them. “Every time it holds his prey, it’s rewarded, congratulated, and it learns to go after that prey, after that attractor,” Camacho added.
Unlike in civilian life, where puppies often get food treats, in the military the only prize for a job well done is a caress and some praise.
In one section of the camp, there’s a trail with obstacles including rocks, a tunnel, a section of empty plastic bottles to clamber over, a ladder and tires.
A soldier beckons the little dogs with a rag they must capture. The brown puppies with black snouts begin running through the trail, jumping over the rocks and crossing the obstacles. One takes the lead and the second struggles to cross over the plastic bottles, but also finishes. Both go to bite the rag the soldier holds.
“Very, very good, sons! Very good, boys,” he repeats while dragging the puppies as they maintain their grasp on the rag for several moments.
Camacho explains that the puppies are known by a number until they are three months old, when they are given a proper name. Each year, the center gives names according to a single letter of the alphabet. In 2023, that letter is “F.”
Febo, Frodo, Fósil, Forraje and Fido are some of this year’s names.
The basic training ends when the puppies are 4 months old. Then, they move to other military units to become specialists in detection of drugs or explosive, in search and rescue or in protection and security.
The current government of Mexico’s President Andrés Manuel López Obrador has relied heavily on the armed forces for various initiatives, from public safety to the building of airports and a tourist train line. And K-9 units have been a key element of some of the military’s activities, like the detection of drugs.
Col. Camacho said that some dogs born at the center have been trained to detect fentanyl, a synthetic opioid trafficked by Mexican cartels that has been blamed for about 70,000 overdose deaths per year in the United States.
That kind of specialized training happens elsewhere, but the colonel says it builds on his center’s basic training by using “attractor” objects but having them impregnated with the scent of what the dogs need to track, such as a drug.
Dogs retire from their military service after eight years, Camacho says.
Many of the dogs have become unsung heroes of missions in Mexico and abroad. Occasionally they become publicly known, like a German Shepherd named Proteo who was part of a rescue team sent in February to Turkey after a 7.8-magnitude earthquake that killed more than 40,000 people.
Proteo died during the search for survivors of the quake. A statue of him now stands at the center.
Another dog that made headlines in Mexico and abroad was a yellow Labrador retriever rescue dog named Frida. The Navy dog gained fame in the days following Mexico’s Sept. 19, 2017, earthquake that left more than 300 dead in the capital. She retired in 2019 and died in 2022.
Col. Camacho said that the dogs have a symbiotic relationship with their handlers during their working life in the military.
“The dog uses us to survive, but we also use the dog to do a job,” he said. “So it’s a coordinated work where we both get a benefit.”
Dogs have nose for COVID-19, studies show. Why aren’t they used for testing?
As the availability of COVID-19 tests dwindle across Canada, another option to detect the virus in the form of a furry friend may be the next best thing.
Multiple studies show that dogs can be more effective, faster and potentially less expensive than the current tests on the market.
The research has grown since 2020, with University of California Santa Barbara professor Tommy Dickey finding the collective research shows trained scent dogs are “as effective and often more effective” than both the rapid antigen tests many people keep in their homes, and even the PCR tests deployed at clinics and hospitals.
But even with studies showing their effectiveness, COVID-19-detecting dogs are deployed only in certain jurisdictions in various countries.
One such place is the Canines for Care program at Vancouver Coastal Health (VCH), which started looking into the possibility of training dogs to detect COVID-19 in early 2021.
Dr. Marthe Charles, division head of medical microbiology and infection prevention and control at VCH, said the idea stemmed from the early reliance on laboratory testing.
“I think there was a will from public health at the time and also from the various levels of government to try to find a way that was fast, accurate and non-invasive to be able to detect and train as many people as possible,” Charles told Global News in an interview.
Three dogs — two Labrador retrievers and an English springer spaniel — were brought in for training. The dogs were exposed to items such as masks that were worn by patients either negative or positive for the virus. This trained the dogs to recognize what is and is not COVID-19.
Charles said the dogs were trained since being puppies to associate the scent of COVID-19 with food and were rewarded each time they correctly detected a positive case of the virus.
“So from early on in their lives, they’ve associated the scent of a case of COVID to a rewarding scent,” she explained.
This reward method is not just used by VCM. It was also used with a group of dogs sourced in early 2021 for a French study, trained at detection using toys — usually tennis balls — as rewards.
Dr. Carla Simon, owner of Hunter’s Heart Scent Detection Canines in Calgary, said this method of training dogs is common. By using rewards, it can help motivate them to find the scent.
“We would pair, let’s say, the sweat samples with COVID, with their reward, and they notice that every time they find their reward, there’s that special smell,” she explained. “We just have to make it rewarding for the dog.”
She added, however, that the dog chooses the reward so trainers can ensure the canines “show up every day and want to do their job.”
Earlier this month, Dickey along with Heather Junqueira of BioScent, Inc. gathered several peer-reviewed studies into a review that was published in the Journal of Osteopathic Medicine. Dickey said the number of peer-reviewed studies over the past few years went from four to 29, incorporating the work of more than 400 scientists from more than 30 countries and 31,000 samples.
The review noted the effectiveness of dogs’ ability to detect COVID-19 comes down to their noses.
“The nose is not like humans,” Simon said. “It’s massively different, orders of magnitude different, and they can detect things without us being able to smell them.”
Humans have about five to six million olfactory receptors in their noses, while dogs have hundreds of millions. One-third of their brain is devoted to the interpretation of smell — something only five per cent of a human’s brain is committed to, according to Dickey’s review.
The study found dogs’ noses may even be able to detect pre-symptomatic COVID-19 cases, or even those who will develop symptoms later.
Dickey told us in an interview that this could help limit or stop the virus from spreading.
“The longer the wait is between your test and your result, that’s a latent period,” he said. “During that time you’re running around spreading COVID and you don’t know it. The dogs with a direct sniff will be done in seconds.”
Many of the studies conducted, including the work at VCH through the Canine for Care program, have shown dogs’ ability to detect the disease correctly with a success rate of more than 90 per cent. Additionally, the studies also showed a high speed at which the dogs could identify cases. In one study in Thailand, researchers reported the dogs had gone through thousands of samples in just a few weeks.
“The dogs take only one to two seconds to detect the virus per sample. Once they detect a patient, they will sit down,” said Chulalongkorn University professor Kaywalee Chatdarong, who led the 2021 project. “This takes only one to two seconds. Within one minute, they can manage to go through 60 samples.”
Even though the research suggested deploying scent-detection dogs could also be less expensive than rapid or PCR tests, Charles cautioned the logistics that go into training the dog is where it becomes “more prohibitive.”
In VCH’s case, training of the dogs included the medical microbiology lab to provide samples for use, working with infection prevention teams and control nurses, and if a dog identifies an area of concern, cleaning services may need to be utilized. And when it comes to rolling out testing using the dogs, enough staffing is needed for mass screening.
Despite this, while Charles says deploying the dogs widely could be difficult due to staffing and training, they are still one of several tools that can be used in COVID-19 detection.
“I think the way to see those dogs from my perspective is really like another tool in the toolbox and trying to prevent further transmission of pathogen of concern,” she said.
Dickey and Junqueira say dogs should have a place in “serious diagnostic methodology” including in helping should the world face a future pandemic.
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