There are no dogs with jaws that actually lock. That is a myth. Some dogs such as Staffordshire & Pit Bull terriers do have extremely strong bites though and can be almost impossible to break, which is where the myth originated.
boxer dogs
One of the strongest dog breeds is the bulldog. Their jaws are very strong. However, when it comes to overall strength, the boxer beats out other breeds!
Boxer dogs. You better belive it.
its jaws
Because they're dogs...
They can be if you train them the right way.
A boxer dog is a jogger because it is a submissive dog.
Food
water.
They have no predators
No
Those dogs come from the same ancestors but the bull dogs are larger so there must be a difference.