Delderby wrote:
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Once a breed is established - as, e.g., "Pit Bull", genetic characteristics will be passed down from generation to generation, plus (unfortunately) some "surprise" characteristics - thrown up from time to time, which in the case of Pit Bulls has caused the problem. No doubt you have heard of thoroughbreds and quarterhorses - bred for speed and stamina. Those characteristics also pass down. But Pit Bulls were bred to be vicious and fighters. Those characteristics will remain in-bred. Forever!
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You obviouslu do not know anything about breeding dogs or canine genetics. I do. I am a recognized expert, and AKC Breeder of Merit with 42 years experience breeding dogs and I also hold degrees in Zoology and Genetics.
First off, there is no such pure breed as a pit bull. The dogs usually labelled as pitbulls are mongrels - mixtures of various large strong dogs, that may have 6 or more different purebred dogs in their pedigrees. Secondly, the breeds that may constitute an individual pitbull are bred for all kinds of different jobs, herding, draft, livestock guardian, combat, police, etc. NONE are bred to be viscious. Even dogs bred for controlling livestock or for bull-baiting, like the bulldog, or for vermin control, like the Jack Russell, are bred to be responsive to their handlers. No dog is ever bred to be viscious - how could it's handler control it? The dogs that make good guardians, working dogs or fighters are bred for courage, strength, and drive, but loyalty and protectiveness toward their human family. Fighting dogs are TRAINED to fight.
Most serious dig injuries are caused by male dogs. Male canines, particularly in breeds bred for individual, rather than pack work, are often aggressive toward other male dogs. In these breeds the females are also predisposed to not get along with other females. This natural predisposition is encouraged by the human vermin who engage in dog fighting, by various abusive techniques.
I breed a breed whose Standard reads "Gay and ASSERTIVE and CHARY OF STRANGERS". Their purpose, in their native country was as an indoor guardian and watchdog. In the breed you can find individuals in which these characteristics make them aggressive in protection of their and their owner's property. Try to touch one of these or something they are guarding, and you can lose a finger. On the other hand, some of these never met a stranger they didn't love, and would never bite even if abused. Each dog is an individual, just like people, and although a breed is bred for a certain predisposition, there is a VERY wide variation among individuals.
In Russia, an experiment was done with foxes to try to breed two different temperaments. Friendly captive foxes were bred only to friendly foxes, and the wild, unfriendly ones only to the unfriendly ones. After about 12 generations. they DID ahve two different groups - wild ones who did not like people and would bite, and friendly ones who wanted to kick people and loved to be handled. But even in these groups individuals were found to vary considerably. Anyone wanting to read about the temperament experiment (which took 50 years) can do so at:
http://scienceblogs.com/thoughtfulanimal/2010/06/14/monday-pets-the-russian-fox-st/