Dogs have an extraordinary sense of smell that allows them to detect subtle changes in our bodies long before we notice symptoms. They can smell changes in hormones, blood sugar levels, or even the chemical markers of certain diseases like cancer or infections.
This is why some dogs are trained as medical alert animals — they can warn their owners of impending seizures, low blood sugar, or other health issues. Even untrained dogs often become more attentive, stay close, or act protective when their owner is unwell.
Their ability to “smell sickness” is just one more reason why dogs are such amazing companions.
