![Jealousy](https://brainyfacts.net/wp-content/uploads/jelous-dog.jpg)
![Jealousy](https://brainyfacts.net/wp-content/uploads/jelous-dog.jpg)
![Feel good](https://brainyfacts.net/wp-content/uploads/feel-good-1.jpg)
Feel good
Stroking dogs and gazing into their eyes releases the “feel good” hormone oxytocin for both people and dogs. Fact source...![Spiked dog collars](https://brainyfacts.net/wp-content/uploads/Spiked-dog-collars.jpg)
Spiked dog collars
Spiked dog collars were used to protect dogs’ throats from wolf attacks in ancient Greece. Fact source...![Obesity](https://brainyfacts.net/wp-content/uploads/obese-dog.jpg)