A Tibetan mastiff. They are much bigger with a bigger jaw strength as well.
the mastiff
A lion would win because it can even kill a wolf.
The S.A.S soldier would easily win.
i think bullmastiff would win,because it is bigger and stronger .
pitbulls fight because they feel it pleases their "owner" so really all your doing is taking advantage of your dogs love and need for approval from you...when the only time the poor dog gets any love and affection and most of the time food is when it wins a fight they learn to fight. Forcing any animal to fight is a cruel and barbaric non sport and you should feel ashamed for even caring who would win a dog fight
jaguar
The German Shepherd would win almost every time it would very easily outmaneuver the English mastiff and get a bite on the back of its neck which it would hold until the English Mastiff was killed or until the fight was hopefully broken up.
This is speculation but obiously the cheetah has the advantage.
90% Tosa Inu
I do believe the Dragon as he has toxic bacteria in his saliva. The Mastiff may not die right away, but die he will..Why would you ask this question anyway, do you have an agenda?
the wolf
an pitbull will bite 50 cent up .but he can pull out a gun and shoot the pitbull.so it denpends if he pulls out a gun and shoot it or with he dont he will lose