
Poor you, that's awful :(
I think you'd be wise to report it, the owners obviously know thier dogs are likely to do this as they have done it before - thier dogs shouldn't have been loose, how irresponsible of them :(
It was very lucky you didn't have your fear aggressive bitch with you, things like this would only make her worse.
Fingers crossed I haven't had this happen to my current dogs (so far, as soon as anybody sees the size of my pup they put thier dogs on lead). But I am really dreading this happen, I am sure it's only a matter of time, a neighbour had her Domerman attacked by another neighbors GSD only a week ago (she got bitten breaking it up) on the route I take my dogs :(