I am so sorry that Maya was attacked. I am fed up with people who let their dogs off the lead when they obviously shouldn't be. I avoid places where I am likely to encounter other dogs, you would not believe the goings on re-dogs at the country park it almost makes you feel ashamed to be a dog owner.
You are lucky Maya coped so well. Fiji was bitten by a Rhodesian Ridgeback when she was a puppy and she is now terrified of bigger dogs.