I am confused. nobody said the dog's life was more valuable than the swan ..
they both are valuable but swans have never been pets and will never be pets. We never did compare the swan to a child either. it'd be different if it were a child, I am sure. but I have never been in the situation where my dogs have bit a child, fortunately and I hope that doesn't happen.
By you asking if ALL staffs are vicious, NO they are not. some can be just like ANY dog but that seriously depends how they are treated and raised.

and no, wolfsoul I don't carry pepper spray.. I was just saying it's more humane. I carry a stick when I walk my dogs to protect both of us. I knew this thread was going to be a huge debate yet again and I am sick of it.