
My guess would be that when the child tripped over the dog he managed to squash a very tender part of the dogs anatomy. Those dogs are NOT vicious.
also had another dog that loved kids and women, but went nuts if a male neighbor walked into the back yard or the house until I told her to be quiet...the only thing we could figure out was that she did not like the smell of testosterone from an unknown male...
The first dog was named Mona, and the second named mugsy..both great dogs...I have been fortunate in my dogs..