Dogs Can Detect Cancer


Yes, dogs can smell cancer. They can even smell it at stage zero. The study found that dogs can detect prostate cancer with 98 percent certainty. Scientists from ‘Medical Detection Dogs’ located in UK have found that dogs can detect prostate and bladder cancer. This type of cancer is most common in the UK, with 40,000 cases diagnosed annually.


The new Italian study from the Department of Urology of “Humanitas Clinical and Research Centre” in Milan confirmed these claims. With assistance of two German shepherds they were able to detect prostate cancer with 97.7 percent accuracy.

It is exciting to have such a high performance detection of cancer, for which previous tests were inadequate. Currently, doctors use a combination of blood tests, physical examination and biopsy to diagnose this disease. But it seems that this is a waste of resources when there are dogs that can safely detect cancer.

Let’s take a closer look at why dogs are even interested in smelling cancer in the first place. Why would a dog be interested in smelling cancer? There has to be something in it for them. The key here is that the dog used his nose for our benefit.

Top dog and wolf evolutionists and biologists are now saying that man may have never made it past the agricultural stage without the dog (and his nose). So why would a dog want to smell cancer? The answer is simple: if something is wrong with us, this will affect the dog. If we are sick, this could directly affect our ability to provide food and shelter for the dog.

Dogs can smell in parts per trillion. An example of this is: one cc of blood, diluted into 20 olympic sized swimming pools. The dog can smell with ease that there’s blood in the pool. We have trained dogs to sniff gun powder, narcotics, missing persons, and now, finally, diseases.

The interesting part about this is that cancer absolutely has a smell. Most oncologists will tell you that humans can actually smell cancer in latter stages through the patients breath. If we can smell it at stage 3-4, then of course a dog would be able to detect the scent much earlier, in stage 0, 1 or 2. So far, the only ones that can smell cancer in early stages, are the dogs.

Training dogs to smell cancer is done in the same way that bomb and narcotics dogs are trained, pairing the target odor with a high value reward. With breath, however, things can get a little tricky. Remember, drugs and gun powder can be isolated, but 
“cancer scent” is one of the thousands of organic compounds within a humans breath. In order for the dogs to generalize the “cancer scent”, many samples with the common odor must be used. Also, they have to be trained to ignore healthy breath, and all other breath with diseases other than cancer.

This means lots of samples are used for the dogs training. Cancer samples, disease controls and healthy controls are needed, and the order and specifics of the introduction of cancer through latter stage training is extremely specific, in order for the dog to generalize the cancer scent. Right now, the important thing to remember is that dogs can smell cancer.