To this date, there are no scientific proof,
but cats and dogs have an acute sense of smell, so they can detect even theslightest change in the environment or smell.
🔸 Owner’s behavior change
The owner’s change in actions, diet, appearance, and smell can all be detected by the sharp, observant eyes of a dog.
🔸 Dogs sniffs out the chemical changes in your body
Well-trained dogs can successfully sniff out human diseases. Because of changes in the body's pH and hormones, they may also be able to detect that their owner is pregnant.