Dogs have helped humans find missing people, detect explosives, track wildlife, and even identify certain biological scents.
But one of their strangest jobs may also be one of the most important.
Some specially trained dogs are helping scientists study endangered whales.
And what exactly are they searching for?
Whale poop.
It may sound funny, but a floating piece of whale scat can contain an incredible amount of information about the animal that produced it.
The challenge is finding it before it disappears.
That's where a dog's nose becomes surprisingly useful.
Why Would Scientists Want Whale Poop?
Studying the health of a wild whale isn't easy.
You can't exactly ask a killer whale to stop by the veterinary clinic for a blood test.
Whales spend much of their lives underwater, travel enormous distances, and are difficult to approach without disturbing them.
That makes traditional biological sampling extremely challenging.
Fecal samples offer researchers a much less invasive alternative.
From whale scat, scientists can potentially obtain information about:
- Diet
- DNA
- Sex and individual identity
- Stress hormones
- Reproductive hormones
- Nutritional condition
- Exposure to environmental contaminants
Researchers at the University of Washington have spent years developing methods that use wildlife scat to study these kinds of biological signals.
Instead of capturing or physically handling an animal, scientists can collect something the animal naturally leaves behind.
There's just one problem.
Whale poop isn't particularly easy to find.
Finding Whale Poop in the Ocean Is Harder Than It Sounds
Imagine looking across miles of moving ocean and trying to locate a small amount of material floating on the surface.
Currents move it.
Waves break it apart.
Wind changes direction.
And eventually, it sinks.
Even if researchers know a group of whales has recently passed through an area, spotting a fecal sample with human eyes can be extremely difficult.
Dogs approach the problem differently.
They don't have to see it.
They smell it.
A trained detection dog can stand at the front of a research boat and sniff air currents coming across the water.
When the dog detects the target scent, its behavior changes and helps the boat crew determine which direction to travel.
The researchers then work with the dog almost like a scent-guided navigation system until they locate the sample.
Earlier University of Washington work with a black Labrador mix named Tucker showed just how effective this can be. UW reported that Tucker could detect killer-whale scat from as far as about one nautical mile away under suitable conditions.
Meet Eba, the Rescue Dog With an Unusual Career
One of the dogs to later take on this unusual job was Eba.
Her life certainly didn't begin like that of a scientific research assistant.
According to accounts of her story, Eba began life as a rescue dog before eventually being adopted by killer-whale researcher Deborah Giles.
Giles works with Southern Resident killer whales in the Pacific Northwest and later began testing whether Eba might have the personality and drive needed for conservation detection work.
Eba learned to recognize the smell of killer-whale scat through scent-training exercises on land before moving onto boats and practicing under real-world conditions.
For a dog, the motivation isn't saving an endangered species.
It's much simpler.
Find the smell.
Get the reward.
The Secret Weapon Is Usually a Toy
You might imagine conservation dogs working because they somehow understand the importance of protecting wildlife.
In reality, many of them are obsessed with something much more ordinary:
a ball.
Conservation detection programs often select dogs with an unusually intense desire to search, play, and earn a toy reward.
That endless energy can make some dogs challenging household pets.
For field researchers, however, it's extremely valuable.
The dog learns that locating a particular scent means getting access to its favorite reward.
That creates a very powerful game:
Find the scent → get the ball.
University of Washington researchers have described this strong play drive as one of the qualities that makes certain dogs especially effective at conservation work.
To the dog, it may simply feel like the greatest game ever invented.
To the scientists following behind, the result can be valuable biological data.
What Can One Sample Tell Researchers?
This is where the story becomes much more important than the funny headline.
A whale's fecal sample can act almost like a biological snapshot.
Researchers studying Southern Resident killer whales have used scat to measure hormones related to stress, nutrition, and reproduction.
DNA in the samples can also help identify which whale produced them.
In one major University of Washington study, researchers collected 348 fecal samples from 79 killer whales between 2007 and 2014 using scat-detection dogs and related field methods.
The samples helped researchers investigate why this endangered population was struggling to reproduce successfully.
By examining hormonal signals, the scientists were able to separate some of the effects associated with nutritional stress from other environmental pressures.
Their findings pointed strongly toward inadequate and inconsistent salmon availability as a major factor affecting reproductive success.
That's a lot of information from something most people would simply call poop.
Why Southern Resident Killer Whales Need Help
Southern Resident killer whales live primarily around the Pacific Northwest, including the Salish Sea.
Their population has faced several overlapping pressures.
One major concern is food.
These whales rely heavily on salmon, particularly Chinook salmon, and shortages can create significant nutritional stress.
Researchers are also studying the effects of vessel disturbance, underwater noise, and environmental pollutants.
Because all of these pressures can interact, simply watching whales from the surface doesn't always tell scientists enough about what's happening inside their bodies.
That's why biological samples are so valuable.
Washington Sea Grant describes scat monitoring as a way for researchers to examine nutritional condition, reproductive health, physiological stress, and toxicant exposure without needing to capture the whales.
Dogs Can Find More Than Humans
The whale project isn't the only evidence that dogs can outperform us at this kind of work.
One earlier study involving endangered North Atlantic right whales compared trained detection dogs with researchers searching opportunistically for whale feces.
The dogs helped researchers collect fecal samples at a rate more than four times higher than the traditional approach.
Similar conservation-dog programs have been used to locate samples from animals ranging from primates to big cats.
A 2024 scientific review found that conservation detection dogs can often search larger areas and locate samples more effectively than human-only methods, although performance varies depending on factors such as training, environment, target odor, handler experience, and the individual dog.
So dogs aren't magical biological detectors.
They're highly specialized working partners whose natural abilities can become incredibly useful when paired with careful training.
Why Not Just Follow the Whales?
Scientists can certainly observe whales directly.
But observation only tells part of the story.
A whale may appear to be swimming normally while experiencing nutritional stress.
A female may be pregnant without researchers knowing it.
An animal may have accumulated contaminants that are impossible to see from a boat.
Behavior can provide clues.
Biology provides another layer of information.
By combining observations with hormone measurements, genetic analysis, prey information, and other data obtained from scat, researchers can build a much clearer picture of what's happening to a population.
And importantly, the process is non-invasive.
The whale doesn't need to be captured.
It doesn't need to be restrained.
In many cases, it doesn't even need to know the researchers are there.
Conservation Dogs Aren’t Just Working at Sea
Whale scat may be one of the most unusual targets, but conservation dogs have been used in many different environments.
Depending on their training, dogs can help researchers locate evidence of:
- Rare mammals
- Endangered species
- Invasive species
- Carnivores
- Primates
- Birds
- Environmental contaminants
Some projects use scat to estimate where animals live.
Others extract DNA to identify individual animals.
Some investigate diet, reproduction, or stress.
And newer conservation-dog programs are even experimenting with detecting environmental chemicals rather than animals themselves.
The dog's role changes.
The superpower stays the same:
its nose.
A Rescue Dog Can Become a Research Partner
There's another part of Eba's story that makes it especially interesting.
Some conservation detection dogs come from shelters.
The same qualities that can make a dog difficult in an ordinary household—extreme energy, obsession with toys, persistence, and a constant need to search—can become valuable characteristics in a working environment.
A dog that refuses to stop looking for its ball may drive one family crazy.
Put that same determination into a carefully designed scent-detection program, and suddenly it becomes an asset.
The University of Washington's conservation-dog program has historically worked with rescue dogs selected partly for this intense play and search drive.
It's a good reminder that a dog's personality isn't necessarily “good” or “bad.”
Sometimes it simply needs the right job.
One Powerful Nose, A Lot of Valuable Information
A dog sniffing whale poop from the front of a boat sounds like something invented for a children's book.
But the science behind it is very real.
Dogs such as Eba and Tucker aren't directly rescuing whales from danger.
Instead, they're helping scientists answer questions that are extremely difficult to investigate any other way.
What are the whales eating?
Are they getting enough food?
Are they stressed?
Are females becoming pregnant?
Are pregnancies succeeding?
What pollutants are accumulating in their bodies?
Those answers can help researchers and wildlife managers understand why vulnerable whale populations are struggling—and what actions might actually help them recover.
All because one animal has an extraordinary ability to find something left behind by another.
Sometimes conservation science is incredibly sophisticated.
And sometimes it starts with a dog, a tennis ball, and a really good nose.