I have owned several pitt bulls over the years & none were aggressive towards humans.
I have kept the following blood lines:
Jeep/Reid
Jeep/Tyson
Tyson/Red boy
Rednose
Sorrel
Every Jeep/Reid bred dog I had would need to be chained though as this line would ALWAYS jump/climb fences to find other dogs to fight. But the others were just fantastic placid dogs similar in character as english staffies which I have also owned. I loved Pit bulls for the mere fact they have heart & you couldnt kill them with a hammer. Other breeds would put their tails between their legs & yelp if hurt by an intruder etc. I saw a news report where a police officer shot a Pitty several times & the dog was still slowly crawling towards him. He had to re-load to finally kill it. Thats the spirit I have always found to be APBT.
Previously I would argue my point to the death that Pitt bulls are "pets not pests" and should be allowed to be owned & bred. However now either being the old fart that I am or the fact I am now a father I would much rather an Am-staff (looks as menacing as a Pitty but does not have the inbred mentally to kill other animals that many APBT have) Not all Pit bulls have the same thought process either, I have had dogs that loved companionship from other animals including cats. I currently have a tyson/redboy bitch of 8 years that is housed at my mothers because it bonded with my brother who was only 2yrs old when I got her & they were raised together. I also have an Am-staff pup at the moment that I am selling due to expecting a baby & would like a puppy AFTER my babies birth so I can raise them together.
I think owners need to realise that they could eventually be walking the streets with a 357 magnum at their side & should take appropriate measures against owning such a weapon to reduce the risk of hair triggers. I still think a dog is only as bad as it has been raised. However a well raised APBT may still have the instinct of attacking other dogs & cats, thats just the APBT trait.
But the attack of other animals should not even occur if owned by a responsible owner. A responsible owner would have his animal leashed while out walking (every dog should be by law anyway). A responsible owner would have appropriate housing for the species (either a large dog run, cage, chain or indoor housing)
The real problem with the species is the negative attention the media has placed on the species due to several attacks on humans (there has been more attacks on humans by german shepards, rottweillers & dobermans over the years by the way, but they have not made the headlines). If raised & trained correctly an APBT should be a very affectionate, loving dog who cherishes human companionship as this is the species nature in general. If trained properly for guard work then the animal should only hold an intruder. It should only attack on command & should also release on command. An aggressive APBT is due to bad ownership or mis-treatment IMHO.
The species lacks fear, has a strong threshold of pain, and is a large powerful animal. This could be a pro & a con of the species depending on HOW IT WAS RAISED. A fearless dog who does not feel much pain is not going to cower when kicked by an intruder attempting to harm your family. An intruder would more than likely avoid the scene due to the large powerful dog anyway lol. The threshold of pain also is a bonus if you have kids that like to pull the animals ears or jump up & down on its back.