My neightbours opposite our house used to have an absolute massive bull mastiff and when their family visited they also brought a bull mastiff...HUGE dogs but they always seemed nice.
A pitbull also attacked and killed my neighbours dog; my neighbour has learning difficulties and was walking her dog (like she does about 100 times a day) and the dog just ran out and attacked and killed her dog - he was a westie - I don't like westies but he was a nice westie.
there is no reason for any dog to be running lose. i dont care what breed or how friendly...for their OWN safety. there are cars and aggressive dogs (even ones on a leash that they could run up to- its happened to me THREE TIMES with my Pitbull, but the offleash dog was the agressive one-charged and got into it without so much as a sniff...one sadly was another pit, another a lab, and a chow...and guess who got beat up everytime!!!???...my dog. laid out flat and got ripped up good. so it is unfair to say it is 'in the pit breed to fight and kill'...it is also increasingly common for dogs to be STOLEN and resold for profit. sad but TRUE! look in craigslist and want ads in the paper. there are currently three posts on CL near me right now where owners' dogs were taken from the yard or CAR!!! a loose-running dog would be an easier target. then the thiefs wither sell them to labs for testing or "flip" them for profit. even a $50 re-homing fee is profit when you get the dog for free.(or cat for that matter)...in this economy that sadly is the reality. happens all too often.
ive worked with all sorts of "bad" dogs. it is lack of knowledge, training and responsibility of the owner. if you cant devote 20 mins a day minimum of walking with your dog and controling it while doing so (no barking no lunging, no growling, no PULLING you, no sniffing, no anything really without you telling them its ok.). dogs neeeeeed to walk. fish is meant to swim. birds are meant to fly, dogs are meant to WALK!!! once you are good at waling them(and it could take time to get them walking well on a leash) then move that into the house (no garbage, no chewing, no whinning, no begging, NO BITING, etc.)...then playtime just for fun...of course with rules there too (that is MY toy and i let you play with it, no biting,etc.)...also common sense!!! (dont leave kids unattended with a dog until the child know the "rules"....could be 5 years old, could be 10. watch them interact with the dogs and teach them what is appropriate play and what is not. i mean, weve all seen two three-year-olds start beating each other becasue one kid didnt know enough not to ...or pinch back, etc.)...or the dog could be chewing a shoe. well dont just take it away, make them ignore it. leave it there and tell them NO when they go for it.
big breeds are more responsibility because as someone already pointed out, they simply are more powerful. and are capeable of more damage. ive seem many more agressive little dogs than larger breeds, simply because the owner doesnt address the bad habits. they simply pick them up and remove them FROM the temptation. whether thats eating things, barking or biting. they are treated like toys and babied a lot of times because the owner doesnt understand the dogs needs.
i rant, but pits NEED and deserve a voice...media is driving a great dog into extinction.
cheers