I'm so glad Leo is okay - must have been terrifying for him. We have a rottweiler we have to watch out for. Our now, 125 pound pyrenees cross was attacked when he was a puppy by this full, very aggressive male. Now he won't dare go after Zain, but he loves to attack smaller dogs. It's always a worry - I've talked to the owner, as she is at a loss why her dog is so aggressive - I told her to get her dog neutered and she pretended not to understand me.