Maybe there is a horrendous mold smell thats not on the report, or the rabid dog that's barking 24/7 across the street. 

It was barking at me from inside the unit.

You will need enough allies to take over the board in the next election or the one after that, depending on how many seats are open each time.Just as people with bad dogs think it's no big deal to have their dogs destroying property, barking and creating fear in neighbors, many people who own commercial vehicles, trailers, unused portable basketball hoops and junk cars have no appreciation that other people don't like their stuff and don't want to look at it.

I lived in a house where the next door neighbors had a dog that literally barked every minute of every day.

A local landscape company quoted me at $5500 for the project - drought tolerant set up with a mix of rocks, bark, and plants/bushes.

Being that I am not a lawyer, I'm certain there are pertinent details I left out ("notice to GTFO" probably isn't the right term), but that should get you barking up the right tree at least. 

Send tenant a notice that you have received complaint about barking.  

If the sibling you are looking to involve is the same one that is doing 8M flips you are barking up the wrong tree unless you are looking for charity.

I barked up that tree and to no avail.

Have you ever heard dogs barking at each other throughout the night?