mouth guards are made of rubber
The name of the greek dog is Cerberus. That is the name of the canine who guards the gates of Hell.
The plural of guard is guards. As in "the dog closely guards the cookie she just stole".
If it is a guard dog it guards property, that is useful.
Many people are used to take their dogs with them to travel, vacation, work, etc. Dog guards are used in the cars to keep the dogs from moving on all over the seats and probably making troubles.
Dogs can be aggressive because of neglect, mistreatment, and the environment in which they live in. Also, it can be because that dog was used for dog fighting once, and or the owner made them aggressive, to be used as guards!
cerbures
Cerberus
Cerberus is the name of the dog that guards the gates to the underworld. Hades keeps the gates to the underworld protected by the three headed dog. Cerberus.
Cerberus, in Greek legend
cerberus
Rihanna has a favrouite dog and it is called a guard dog it guards chris brown away