Neighbor dog lunging toward debilitated fence

[Jacky Johnson]

I have a neighbor whose dog likes to bark and lunges toward a debilitated fence separating our property line. Currently, I'm placing long poles on the posts at an angle to support the fence. If one day the fence crumples and collapses due to the neighbor's dog lunging toward the fence and I need to repair or replace the fence, how should I discuss with my neighbor? What if I don't want to pay for the full price (e.g. I pay 30% and they pay 70%) of repairing or replacing since if it's their dog's fault for lunging and wrecking the fence, how should I also discuss with my neighbor? Thank you.