I was walking my Lab last summer, and a dog (German Shepherd) went through his electric fence. He came running at me and I just took an aggressive stance between him and my own dog. Whatever way he tried to go, I side stepped in front of him.
I didn't even think about escalating to a kicking in the face situation, and his owner finally ran out to get him before anything bad happened.
99% of dogs are pussies, and will back down if you show them who's the boss. I agree with Falcon....kicking would make what's probably a harmless incident into a brawl or a bite. One thing I took away from watching Cesar Milan is that dogs will match your energy. If you freak out, then the dog probably will too.
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