FDC & Associates Community Forum

My neighbor and I share a fence. It appears to be a retainer fence about 6 feet tall. I believe her property is 1 foor higher than mine. The previous owner of her property installed a water feature with rocks that flows into their pool. It appears the rocks are leaning onto the wall. The wall appears to be moving.
Would it be prudent to first survey to confirm who is responsible for the wall? Is there a way to ascertain if the movement of the wall is caused by the rock waterfall or perhaps other vegetation in the yard? My husband also suspects some overgrown junipers.
We love our neighbors and do not want to create a problem. However, I am concerned about the wall coming down. My husband favors the lets wait and see if it comed down. I worry that it will come down during a quake and not be covered by home owners insurance.
I know that I am asking many different questions, some perhaps outside of your areas of expertise, but any advise would be appreciated.
Worried in Chino Hills