Unfortunately, the truth of the matter isn't as cut and dry.

Only when I filed the FTPR did they suddenly start mentioning as a countermeasure new conditions of the house I'd already fixed everything of which I was aware - still in possession of all the heaters I gave them during the winter, in addition to the baseboard heaters I installed after it closing, she now began complaining about the "lack of heat" in court during the hundred-degree dry spell of July.Her friendly demeanor now having vanished, she answered the door with a stark expression saying, "I don't know what games y'all are playin'", and after five minutes of argument, allowed me to come in with the lead inspector who passed it.

Telling sellers they will buy the property and NEVER DO and hang home owners out to dry...

It'll depend on what the dry wall situation is. 

Is it possible that the cheap-o cleaning got some dormant dog smell wet and all it really needs is to finish drying out again? 

Would you open a restaurant franchise or go after storage unit businesses, dry cleaners, etc?

I rinsed them off with the hose, let them dry, then installed them againSadly, this is the cost we pay for having dogs in the house.

You will want to chemically treat the studs and wall behind each piece of drywall to kill the remaining spores and make sure the walls are completely dry before any is put back up. 

Late May through late September is bone dry. 

I wouldnt assume there would be much mold because it is a dry environment, but possibly do a once over with bleach, fan and air it out for a few days, fresh coat of paint, and call it good.