Pit bull....

Wish I could find the time to read all the comments, have some questions about them.
I still haven't called my insurance agent.
Wife has spent some time looking, seems like most of the breeders breed certain traits into their pups. Not looking for one of the genetic freaks...not looking for a cinder block of a head on legs...
Really hoping to find a local breeder....
Went to a small dog event over the weekend. Spoke to a woman that has 2 Pits...the one she had with her was very calm and quiet. She has had the 2 of them for 7 or so years...never a problem with them...other than they both have allergies.
Spoke to a trainer about them. She told me that canines have several cycles in their lives. To better help explain this....
Azul, one of Redbone Coonhounds, was spayed when she was 6 months old. After the first surgery she remained her fearless self. Approaching a year of age she went into heat. Vet had an ultrasound done, a small piece of ovary was missed. Second surgery was done. Took 4 hours or so. Vet actually had to remove her stomach.
Now she is fearful of EVERYTHING. Prior to second surgery neighbor would be shooting, Azul would be at the fence, barking. After the second surgery, one gun shot and she is trembling for hours. Trainer said that canines have 2 "fear cycles" in their lives. One at 3 months, the at around a year. She thinks that there must have been a loud noise at some point during her second surgery, and that this loud noise triggered a fear response.
She went on to explain that, in most dogs, this aggressive temperament can be "learned" by any breed if exposed to the right stimulus at the right time.
Have been around Blue/Red Heelers.....Australian Cattle Dogs....since 1994. Have had several folks tell me I was nuts for having them. They are aggressive, thick headed with the jaw strength of a "Pit bull". That they are known to bite....
Have had zero troubles with either one. Max, the male, did go after me once. I was rough housing with him and thought we were done...well he wasn't. Queenie, the female, was a bit of a nipper when young. Ernie stuck 2 fingers down her throat...solved that issue. Both did go after our feet for a while....well, they ARE herding dogs after all. We broke them of it, as far as trying to herd humans. Queenie took to herding the Coonhounds around. Now it is kind of funny to see one the Redbones going after the others feet in an attempt to herd her.
I quest my point is ANY dog can learn a behavoir. Which is why I will not go get a pup from a shelter.....have no clue as to the history of it. I may be wrong saying the last statement but it is how I think about it so...
Again, would like to thank you folks for your opinions. I would also like to express my gratitude to the folks who provided data on addition to their comments...