@TerryH 
 I am sorry for your loss!
Thank you so much for sharing your journey. 
I live in the PNW and we have some sort of fungi on EVERYTHING. Very scary.
In my coop and barn I use Sweet PDZ ($17 per 40#) It works very well for drying things out and absorbs any ammonia odor as well as being safe to your respiratory system.
I saw someone recommend Vet Rx, I have read good stuff about it. However, I 
can't agree with them that if it's natural it 
must be safe..... lead, arsenic, and many other volatile things are natural. Even salt can kill a person.... but they can't live without it. :/  
Your experience (very heart breaking) will help many people. Stinks that an act of being good to and trying to provide a nice space for our animals could end like that. With all my heart, I am glad you were vigilant and able to save the rest of your birds! I also am a little jealous of the resource you found and have.
Best wishes for a speedy recovery for your family and flock!