are you raising them for companionship or for security or for show?
(i assume for companionship.) i work at a dog kennel/rottweiler breeder.
l there are many types of agression:sex, territorial, fear-related, food, dog, crate, and human agressive. pitbulls tend to be dog, human, and territory aggressive. ach type of agression must be dealt with differently, agression is a very very serious issue and hard to reverse after puppyhood.
ike with most instinctively agressive dogs, pitbulls must be weaned from thier agression ASAP, immediatly after weaning is a good time to start socialization. spaying annd nuetering helps greatly as hormonal males (and females) tend to be very agressive and territorial. socialization early is the key. by this i mean to accustom the dog to positive situations with other dogs and humans. this includes plenty of human/dog contact with LOTS of reward and reinforcement. socialization should also be brought on with basic training, if not after. remmeber that dogs seek constant reward, good behavior=reward. rewards can be food, praise, pet or play. use all types of reward-this keeps the dog intersted and avoids compulsive thinking. pitbulls are very strong dogs-know his/her limits. MOST IMPORTANTLY OF ALL: establish the alpha standing immediatly. this means to establish that YOU are in control, that YOU are in control of rewards and regimen.