Last night my SIL told me he was walking their lab around the local lake on a walking trail and as they approached a couple with a pair of pitbulls the male pit bull snapped his leash and charged my SIL and his lab. My SIL is 27 and a fireman so he's in excellent shape when the pit bull latched on to his lab he hit the pit bull in the head as hard as he could swing(his hand is still sore!) and the pit bull turned loose and staggered away, he said he must have almost knocked the dog out. The owners apologized several times and led their dogs away. There's no doubt that pit would have killed their lab if my daughter would have been alone and walking the dog.