I'm on the fence with this one. I've seen my dogs charge the fence, barking, and I don't like that. But they appear to love the neighbor's dogs behind us. They all charge up, bark, shake their tales and after some trash talk they will all settle down.
Now, Ceasar calls that fence fighting, but this does appear to me to be entirely agression. I'm going to watch it and form my own opinon of what is going on.
Initially, I think there was agression, but now it appears to be just re-establishing boundaries.