Spray Shield by Petsafe has stopped many dog fights
I have a big German shepherd/malamute mix, a very sweet dog but with problems around other large breeds. We adopted him 1 1/2 years ago and didn't know his temperament entirely, but noticed his aggression. I've been through at year of training with him, but still there's an occasional problem. SpraySheild has effectively diverted the dogs' attention to allow me and other owners/handlers to intervene safely to prevent a real dog fight. I have also used it to intervene with other dogs fighting, all in dog parks. Again, it was hugely effective. The other owners mostly thanked me, after finding that it is safe to the dog, and so effective. Some owners have been upset, but this is mostly calmed when they realize that they may have saved from huge vet bills to the dogs that might have occurred in the fight, or hospital bills for dog bites if they had been bitten trying to intervene.