Breed of the Week: Rottweiler

Environment: Can live anywhere as long as there is exercise
Health: Prone to weak bones, hip dysplasia, and weak shoulders because of overbreeding
Grooming: Need daily brushing for double-layered coat and to prevent shedding
Trainability: Early training is a necessity, they need hard work and dedication, highly intelligent and easily trainable. Training is necessary to their knowledge of when to protect and when to be calm. Training is not optional with this breed.
Family Friendly: Use caution with strangers

Rottweiler's were bred in Rome to herd and guard and have since been bred to work, protect, and please. They also have many distinct features such as black and brown coloring, docked tail (docking is illegal in the UK), and their loyalty when properly trained. They are also known for for their iron jaws that hold 328 lb of pressure per inch, and since the strength of a dog's bite is relative to skull size and Rottweiler's have larger skulls. Rottweiler's are also easy to overfeed, but if you feed them too much protein they will have growth spurts which will further weaken their bones.

http://www.animalplanet.com/tv-shows/dogs-101/videos/dog-breeds-l-z/