Bravest Dogs - TOP 10 Bravest Dog Breeds In The World! Really loyal dog

What is the secret behind the loyalty of dogs?
The study showed that the percentage of the hormone "oxytocin" increases in the brains of dogs when it looks at a person, and this hormone leaves an effect that is reflected on the dog, as it leaves it in a state of calm and reassurance, and this particular hormone is known to increase the sense of trust and belonging within it.