[blockquote]Now to make it all the more scary, this Pitbull was 12 years old! And get this....it only had it's "back teeth" left in its mouth (I guess they fell out due to old age?? or bad care.....). The Mastiff (who in all fairness, was ONLY a puppy....shy of 2 yrs old), did not try to defend itself. It just cowered and tried to get away.[/blockquote]Oh my goodness. So let me get this right a "pitbull" by that I think they meant American Pit Bull Terrier only has its back teeth and was able to seriously damage a 2 year old "English" Mastiff? I don't believe it. Firstly, no self-respecting English Mastiff would cower and take that kind of crap from a defanged "pitbull". Secondly no defanged "pitbull" would be able to grip and hold anything on an "English" Mastiff except .. humm.. I won't go there. Do you see the silliness of that story - dogs need their canines to grip or rip. Now about a 2 year old "any" Mastiff that allows itself to be tormented by a 12 year old "any" Bull is not worth the food it processes. ESPECIALLY if it's owner is in the same location and in jeopardy. It cowers and tried to get away - What are our dog breeds becoming? At 2 years old any of the mastiff breeds should be mature enough to protect or at least defend themselves. In actuality they should be doing that at about 8 months old. This "mastiff" probably slept on its owner’s bed and never had to learn to be a dog. Thanks for posting such intriguing questions - it does make us think about what we would do. I went through this scenario already and it was not fun.