LisaM
Oh, I am so sorry, I know how you feel, it happened to me here in WS, 2 off leash dogs near Madison MS attacked my on leash dog and bit him. It was terrifying.
I worked with a trainer after b/c my dog became very reactive to other dogs after the attack and now we avoid other dogs and stay in parks/neighborhoods that are familiar.
So, here is a tip from the trainer and I have tried it, and it works, but…it may not work with a super aggressive dog bent on attacking, so the spray might be better, but here is the tip:
carry food/treats in your pocket and if a dog comes running toward you, throw the food at the dog and it will distract them long enough to get away. I actually threw a toy at an oncoming dog once and it totally distracted the dog until the owner could catch and leash it.
I hope that helps, but the spray might be your best bet…