Dogs are considered as one of the most loyal friends any human being can get. If trained in a proper way, these dogs can prove to be quite helpful. They are perfect companions for vision challenged people and a real friend for lonely people. Dogs used as guards are usually bigger in size.
The purpose of guard dogs is not only guarding homes and ensuring safety and security but also excellent companions. If there is any such requirement, the guard dogs can easily take upon the entire world. In order to protect the loved ones or its owners, it is ready to go to any extent. Top guard dogs breeds that are highly reliable and trustworthy are- Caucasian shepherd 
Quite popular in countries like Turkey, Georgia, etc, Caucasian shepherd is one of the top guard breeds being used.
The weight of this dog ranges from 46 to 82 kg. 88 cm is its height. If you are planning to keep this breed as your guard dog, it is important to ensure that your home as enough space that is necessary for accommodating it. The major advantage of using it as a guard dog is happy disposition of this dog irrespective of any climate.
These dogs are always ready to safeguard their territory, and at times, they can be quite aggressive. For controlling the aggression of this dog, it is necessary to teach socializing. Argentinean Mastiff 
Looking cute in a short coat, white in color, Argentinean Mastiff is an extremely territorial and a fierce dog. Their height is no more than 62 cm. There was a time when this dog was used for catching fugitives and villains.
For controlling the anger of this dog, it is necessary to give this dog proper training. Other dogs cannot be tolerated by this dog. If provoked, this dog can become highly aggressive. Bull mastiff 
This is a highly alert guard dog and is quite sturdy in build. It is considered one of the best breed of guard dogs used the world over.
With 63-69 cm height, the weight of this dog reaches 50-59 kg. The dog relies on its instincts and can differentiate between enemies and friends. German Shepherd 
Quite commonly used all over the world as a guard dog, the German Shepherd is perfect for ensuring security. With 60 cm height, the weight of this dog reaches 22-40 kg. Endowed with keen intelligence, this dog is perfect for safeguarding families and kids. Doberman 
This is another guard dog breed which is quite loyal, intelligent and alert.
The dog exhibits quite an aggressive behaviour, but it can only be controlled with proper training. The weight of this dog can range from 34 kg to 45 kg. The above mentioned guard dog breeds are perfect for proper safety and security.
